One of the tools I use when I start to feel overwhelmed is to estimate the time each item on my things-to-do list.
Then I have fun trying to beat the time I have allotted for each task.
This also helps to me pace myself. It is not unusual for me to expect myself to do thirty hours of work in eight hours of time. So when I use this technique I also add up the hours I have estimated the work will take, and when it exceeds what I can do in a day, I prioritize the tasks and put most of the work on the other days of the week.
This prevents me from expecting to write three poems in an afternoon, or a chapter of the novel in a couple of hours. Then I have less frustration and self-hatred when I am done with the work for the day.’
Frustration and self-hatred can also cause writer’s block which compounds the problem, making it almost impossible to write.
Pacing is a much better idea.