I'm battling procrastination for 15 years now. The three only things that really worked (as in "having effects beyond a few months") for me:

- Accepting procrastination as part of you & forgiving yourself: https://news.ycombinator.com/item?id=10267564

- Tackling only one important task per day: http://fourhourworkweek.com/2013/11/03/productivity-hacks/

- Tiny Habits: http://tinyhabits.com/