OK, let's have an understanding here, fella. A little coming-to-Jesus meeting.
You just tried to go to a website that you blocked. Do you realize how self-defeating and pointless that is? Really, you look like a four-star fool. If you just tried to get on Facebook when you know you're not supposed to, you're an even bigger idiot than I guessed.
Getting past that, why are you even cruising the web right now? You know you're only procrastinating. You should be writing. Got nothing to write? Pick up a book and read! You have hundreds of books, and you haven't read half of them.
Go for a walk. Call a friend. Write a letter. Do sit-ups. Submit poems for publication. Visit a museum. Pick up the guitar and play a song.
Do something -- anything! -- other than waste your time with whatever piffling diversion you just tried to waste your time with.
And if you can't think of anything to do, just try sitting there and being a person. Do nothing. Let yourself be bored.