It doesn't work for me - I've tried. Self-control works really well for me when the task at hand is really interesting and I want to give my everything to it. I don't know about you but so far those tasks haven't come to me at a regular pace. And I tend to seek out these online distractions as a diversion tactic when the task I'm supposed to be working on is really boring or uninteresting. So it's all about one's personality.