A year without the internet. It was wonderful for the author at first, but after a few months:

I'd learned how to make a new style of wrong choices off the internet. I abandoned my positive offline habits, and discovered new offline vices. Instead of taking boredom and lack of stimulation and turning them into learning and creativity, I turned toward passive consumption and social retreat.

Ahem. Procrastination pro tip: For one week, forbid yourself your top N methods of procrastination. If you have a method N+1, soon you will bask in old love made new; if you don't, soon you will make a wonderful discovery...