(this post originally appeared on the by.dialex.com blog here)

For many years, I have been using David Allen's Getting Things Done (GTD) productivity methodology. It is simple and easy to follow. All along, I tried nearly every to do list possible - Outlook, Notepad, Wanderlist, Onenote, Excel. They all felt clunky and against the beauty and simplicity of GTD. When I finally found ToDoist, I was in extasy.

Press + Add task on any Todoist platform. Type out the name of the task you want to add. Click on the Add task button to save the task. After completing a particular task, you can mark that as complete by clicking on the circle to the left of that task. Connect your Todoist to hundreds of other services. Todoist is a to-do list app and online task manager that works across 15 different platforms including Web, iOS, Android, Google Chrome, Mac, and Outlook. Turn on Applets to quickly and automatically create new tasks, and sync or share tasks across other systems and services.

ToDoist is everything I could want in a to-do list and productivity management tool - simple, elegant and quick. It gets out of your way. It has just the right amount of customization without being everything to everyone.

If you haven't used GTD, review this quick reference chart as I walk through my process. Here are my top 10 tips on how to Get Things Done with ToDoist!

1. COLLECT EVERYWHERE USING TODOISTS MANY INPUT METHODS

One of the main reasons I love ToDoist is that you can put it everywhere. Install all the clients. Keep it open on your desktop. Have it in your mail client. Have a quick email to your main projects. Here are the ways that I input my tasks using ToDoist:

1. I enter most of my tasks using the PC client with Ctrl-Alt-A (which is the quick add shortcut on PC - I am sure it is similar on Mac)
2. I add tasks on my mobile and iPad when I am on them (usually when out or doing the reading) using the great iOS application.
3. I add tasks to my favorite projects with add task via email.
4. I add tasks in Gmail with the great ToDoist Gmail plugin. Got an email with a task? Just hit the ToDoist button.
5. I add tasks while browsing for a web page I need to remember via the chrome and firefoxplugins.

2. SET YOUR TODOIST PROJECTS TO BE THE MAIN CATEGORIES IN YOUR LIFE

Don't go too deep on your ToDoist Projects. I like two levels. This is because you can still group related tasks into subtasks to do grouping inside of a ToDoist Project. I have three main projects: Work, Home, and Shared (for shared projects). Under Work, I have Sales, Marketing, and Operations. Under Personal, I have Career/Coaching, Chores, and Shopping.

3. REVIEW TASK LIST EVERY DAY / EVERY WEEK USING THE IPAD APP

I love the iPad app the most for reviewing my ToDolist. I have to confess that I do this before I get out bed every day. I have found doing my review in the morning avoids the end-of-day decision fatigue (this is a real thing!) When I am reviewing, I am trying to do a few things. Reprioritize my list, move things out of my inbox to correct projects and get items that are old to the right dates. The iPad application works best for me because not only is it small and great for my pre-morning blanket wrapped to do a review, but swipe left is the quick method for moving to a new date with an awesome interface to move something to today, tomorrow, next week, next month or custom. On Sundays, I usually try to look at the whole list, not just the stuff that has fallen into today 'pile'.

4. USE FLAGS AND DRAG TO ORDER TO PRIORITIZE IN TODOIST

Task Priority is one of the difficult things in any to-do list management system. How do you keep from having 20 top priority tasks? The red, orange and yellow flags will automatically default to the top of your list if you are using priority sort (which is the default). Thus, I use the colored flags to set my top priorities. I usually set one red flag for my main thing I want to get done that day, and it is usually customer related. I set 2-3 orange flags of important tasks that should get done that day. Finally, I have a few key habits that I leave yellow. My next priority is done via the drag and drop order. Inside a flag color (including no flag), you can just drag and drop to change the order.

5. SET CONTEXT AND TIME REQUIRED USING TODOIST LABELS

This may be one of my favorite things about ToDoist is the label/tagging system. This is where most people fall down on the GTD system. If you can set the context (where you are) and how much time you have (5 minutes or 60 minutes?), then you can always look at your to-do list in a 'gap' time and not have to think about what to do next. This is the key to productivity. Reduce your decisions. Know exactly what to do next. I have created color-coded labels for a few time frames from 5 to 60 minutes and a few contexts (PC, iPad, Home). You need to make your own, but as an example here is what my label bar looks like:

6. USE TODOIST'S LABEL AND RECURRENCE FEATURES FOR MANAGING HABITS

It is so easy to setup the Habit tasks in ToDoist. I try and do certain things like exercise and meditate every day. I set up a recurrence on these items using ToDoist's recurrence feature. If you want a task each day, you can just type in the date field 'Every Day starting today' or for a shortcut 'Ev Day start Today'. In fact, ToDoist can recognize most English dates like 'Each Weekday' or 'Every third Tuesday starting' or 'The first of every month.' I also use a label for my habits that is in red (see above) which easily lets me see my habits at a glance. I created a filter that shows my habits still left to be done today as follows: @Habit & (today | overdue):

7. DEFINE A SYSTEM FOR THE 3-D'S - DO, DELEGATE, DEFER

One of the key points of GTD is to be able to continually parse the flow of your life. To me, this is mostly email. I try and read my email multiple times per day (I know this goes against the convention). I have found continually parsing to be easier and less stressful to me. I try not to be interrupt driven, but when I first sit down in a gap, I process. Emails are either done in real time (if less than a 2 minute action), delegated to someone else (I use ToDoists shared projects with some of my team to assign a task. Otherwise, I just fire off an email and star it to review later), or defer it (create an action for the future in your ToDoist). At this point, if it is trash, spam or FYI, I usually just leave it read in my email box for later searching (search to me is better than filing). I do set up a tag for a future task that 'NeedsProject' or 'Someday_Maybe', as you can see from above. These are both GTD categories on how to defer items that are not tasks, but instead are containers (projects) for several tasks and items that you may eventually get to respectively.

8. NOW USE YOUR PRIORITIES AND FILTERS TO DECIDE WHAT TO DO NEXT!

Now that you have tasks in and you are ready to sit down and start working, use your filters and priorities to decide what to do. Do you only have 5 minutes? Filter for just 5-minute tasks. Sitting at your computer, filter for your computer context. Stuck at the doctor's office with only your iPhone? Filter for just your tasks labeled phone. Are you ready to just do the next thing? Pull up your Today tab in ToDoist and do your next task. Try to finish your red and orange tasks every day. Go back and look at your completed tasks on Sunday and you will be amazed how much you are getting done.

9. HERE ARE SOME OTHER RESOURCES ON TODOIST AND GTD

No system is perfect. You have to find a system that works for you. Before I found my system, I had read many books and tried many different things. Here are some other links to resources about ToDoist and GTD:

• Some of my methods were based on this ToDoist article on GTD.
• This article helped me with some of my contexts and filters (note that ToDoist does not let you use labels with the < symbol anymore).
• Here is a great blog post by Becky Kane (@19Kane91) about how she uses ToDoist and GTD.

10. BONUS TIP: USING A POMODORO TIMER

A Pomodoro timer is a method for driving flow - the ability to get lost in deep concentrative work where time seems to disappear, and you get tons of work done! Pomodoro is the best way I have found to get flow. The way it works is you set a timer for 25 minutes and work without breaking. Then you set another timer for 5 minutes and goof off on anything you want. You do this for four cycles and then take an extended break. Here is a quick and dirty Pomodoro Timer.

I hope your new year starts off great! But more importantly, I hope these tips will help you build a habit of organizing and attacking your tasks that will make 2016 your most productive year yet!

Todoist is a great app for many reasons – but some of the features can be difficult to find.

Viewing completed tasks is one of those features that took me some time to figure out and I get asked how to view completed tasks from time to time.

You can watch this short video to see exactly how to do it – there are 2 main ways to see your completed tasks.

However, if you aren’t a premium user you are somewhat limited as you cannot see ALL completed tasks.

Todoist Keep Completed Tasks

That shouldn’t stop you from using this great app though, and if you’re a productivity oriented person who likes to use the method of completed task review one a daily or weekly basis you should really ante up for the premium app – it’s a couple of dollars per month and well worth it.