How often do you go to a site like Facebook in a day? If you’re not in the most productive mood I wouldn’t mind betting that at some point you’ve been back so quickly nothing’s changed at all.
It’s very easy to start mindlessly checking websites over and over again, I’m not so bad with Facebook but there’s a loop of tech sites I can get myself stuck in, checking them again and again without really thinking. Fortunately there’s a web app out there called KeepMeOut! which can help to break your web surfing addiction.