Rated 5 out of 5 stars
The idea of blocking webpages from yourself may seem absurd at first, but I have found it very effective. When you have to write academic texts, all too often you get stuck at a particular point and then look at a completely different webpage just for distraction. Now I just look at the "blocked" sign and return to work much quicker; LeechBlock is a good tool to help breaking bad habits. I especially like how sophisticated it is in terms of choosing times when certain pages are blocked etc.
It does not stop procrastination completely though:
1) It does not stop you from looking at irrelevant webpages that you find via Google. For example, I read the sentence: "Dedicated to our collegue Dr. V. P. da S., who was killed in March 2004 by African bees during an excursion in the Pantanal." in the opening of a journal article and spent some time finding out how dangerous bees can be to humans.
2) Instead of procrastinating on your favourite webpages, you may find yourself procrastinating away from your computer; I spent some time eating cherries I found outside on a tree and practicing my juggling skills. Overall, however, I'd say that is still preferable, since at least you spend less time in front of your computer.
3) That "blocked" page tells you to write a review, which is what I'm currently doing here. It is also a form of procrastination, since I should be finishing my chapter. However, I think I will only write one review, so from tomorrow onwards that should not be a problem either.