Long-term problem: Comparing yourself to others. When done in modest amounts this can be a huge source of inspiration. But taken too far and it becomes a sure path to anxiety. Beyond that threshold the only person you should be comparing yourself to is the "you" from yesterday.
Short-term problem: Sounds like you have an addiction to distraction. I suffer from this also and just started reading this. Too early into it to tell if it will help but so far it looks promising. I've also found the Pomodoro technique helpful.
Get dozens of book recommendations delivered straight to your inbox every Thursday.