Stop trying to be perfect. Of the 10 things that you have on your to-do list for today, 2 of them are more important than the other 8 combined.
Choose which 2 are critical for today, work on them until they are complete (i.e. good enough), and when they are done, move on to the other 8. You’re not going to get everything done, live with it – it’s ok! Do the important things!