1) look for some psychotherapy. Really. You'll read a lot of advice everywhere, people in very good-faith sharing what worked to them, but you'll spend a lot of time experimenting to check what works best to you. A good therapist will speed up this process a lot.
2) now, my piece of advice, which worked well to me: read The War of Art from Steven Pressfield. Forget the criticism about his religious tone -- people doing them didn't read past the second part. There's something really interesting in the act of "personalizing" procrastination. It seems it makes it more tangible, approachable, avoidable, I don't know. It was cheap last time I saw, give it a try.
2) now, my piece of advice, which worked well to me: read The War of Art from Steven Pressfield. Forget the criticism about his religious tone -- people doing them didn't read past the second part. There's something really interesting in the act of "personalizing" procrastination. It seems it makes it more tangible, approachable, avoidable, I don't know. It was cheap last time I saw, give it a try.