The Productivity Owl is a Google Chrome extension that eliminates your time wasting habits on the internet.
Instead of just blacklisting certain websites, the productivity owl is present on every page. He allows a certain amount of time to get the info you need, then get out. This creates a system where you learn to find what you need fast. If you don't go fast to beat the owl's timer, the owl will close the page's tab for you. More Info »
Of course work-related websites (and search engine pages) can be given a free pass. On these pages, you will have all the time you need. Just set those websites as "Allowed Websites" in the options. Certain sites such as Facebook and Youtube should be set as "Blocked Websites" in the options.
You must plan all your breaks in advance with the "Freetime Scheduler." During "Freetime" the owl will not close your tabs.
If you really want to be productive, you must "Ride the Owl."