Left 4 Dead 2 is the greatest game is the history of games, so I understand wanting to spend some time exploring it's many riches. What I find useful is to set

Left 4 Dead 2 is the greatest game is the history of games, so I understand wanting to spend some time exploring it's many riches. What I find useful is to set a timer. When the timer goes off, after, say, 15 mins, it's time to stop. It also helps to have enough sleep. My overall concentration and willpower are far greater when I've had enough sleep, and that leads to less unproductive games playing, or Internet browsing, or whatever. Finally, todo lists and well defined goals for the day put pressure on to Get Shit Done. Especially helpful if you can make yourself accountable to someone else.