Who else is a creative that struggles with being productive, and what helps to get you back on track?

I know I’m not alone, but it feels like it, and it always helps to connect with people who are similar. In a few words, I can’t seem to stay focused and organized and it’s a personal starting point. I’m definitely going to start chunking things. How do you avoid a lot of the creative self-doubt that keeps you from feeling productive or taking action? How do you stay on track, creative friends?