Prioritizing myself. Specifically, my health and my writing. Every day I go to bed with the intention of getting up in the morning, and doing my little stretching and light yoga regimen. 15-20 minutes, tops. Every day, I fail to do that. The tv series I am writing is ready for some real, head down, hands on the keyboard, work. Every day I plan to spend an hour in the evening working on it. Most days, I fail to do that. (Despite the enthusiastic support of my wife who - whenever I say "I want to do some writing" - will immediately make room for me to do so.) So I am totally empowered to do these two things, and very excited to do them. But I don't. So. What's holding me back? I have no idea.
ADD/ADHD, it sounds like. You know what you should do, you want to do them, but it sounds like you get easily distracted and don't follow through, which is symptomatic of those conditions. I recommend setting up an appointment with a clinical psychologist to get a diagnosis