Block the sites that you waste too much time on. I have a habit of loading news/discussion sites anytime I'm waiting for something to complete. Blocking the si

Block the sites that you waste too much time on. I have a habit of loading news/discussion sites anytime I'm waiting for something to complete. Blocking the sites I use too much such as HN, Reddit, Craigslist etc. breaks my streaks of going to them, disrupting the habit. The 'site not available' message helps me refocus.