Same 'speaking from living' and I want to amplify a spark you mention: break down the task into smaller pieces; the size of the piece is how much time you can force yourself to do the task, fully knowing after 5 minutes (10 minutes, whatever) you'd have done that mini-piece. This builds success, power, confidence. Then you can tackle the NEXT piece, etc. Virtuous cycle. ("See, it wasn't THAT bad...maybe even a little fun!")

How do you eat an elephant? One bite at a time.