Bells and whistles apps become toys for me and then I dump them because it takes too long to use them. This has been good so far.
Also I just dump to do's in it as I think of them.
At night I review the list to update it, and in the morning I pick my top 3.
Hope this helps!
It's important to include time to rest, like a daily power nap, that will replenish your energy. Calm app has a great one that wakes you with birds singing. It's also good, even if you can't sleep, to just lie down and rest/relax for 20 to 30 minutes. You can use soothing music or total silence.
The rest helps me sit up and finish priorities still left.
I go through my task list and see what must be done that day. A wise person once told me, and she said she did this, to look at the day's list and see the one thing that must be done that day and put the others off if you must. Don't feel guilt or like a failure.
When you're able to, then do all three priorities. A friend who is a successful executive said do one big thing, one medium thing, and then one little thing. If you can do more, great! But again, if not, no worries.