What I hate about all other task managers is: if I'm too busy to complete a task by the deadline I gave it, I'm too busy to reschedule it, so overdue tasks just pile up and sit there and then there are so many that you don't even know where to start anymore.
What I love about Motion is that I tell it some information about the task up front (how long I think it will take, whether the time can be chunked, priority level, what times and days I'm willing to work on it, etc) and then it looks at everything I have on my plate and auto-schedules everything.
And, if I don't complete a task when the system originally schedules it, it will look for the next available time slot that fits the schedule and priority I assigned to it, or, if it's important and urgent, it will keep scheduling it for right now until I do it.
So if I create a task to get a haircut but I can only step away on Thursday and Friday afternoons from 3-5 to spend an hour at the barber, and the system originally schedules me for Thursday at 4, but I miss it, it automatically moves the task to Friday at 3 on my calendar. Lifesaver.
And the task management feeds right into the project management, so the system can look at all the tasks and stages of a project, determine how an entire team of people's calendars look for the next 90 days, and tell you right away if you will complete your project on time or not.
Anyway this is not an ad, I just rely a lot on these two tools to keep myself from decaying into a pile of wood chips on a daily basis. Some people need to check off a daily recurring task reminding them to load the dishwasher otherwise it won't get done with any consistency and I am one of them.
I have a task on my list to go to the National Capital Trolley Museum. I've never been, and it's not especially easy to get to and the hours are really weird. Without a tool like this, I just would never go. But periodically this task bubbles up on my Saturday calendar and reminds me that I should.