Boston.com lists a few things on how to mess with your perception without any drugs.
Now if you will excuse me, I need to get some ping pong balls and a radio.

A Blog About Nothing. We are a group of guys in Vancouver, who enjoy watching Seinfeld and Curb Your Enthusiasm. We discovered that whenever we get together, we talk about nothing with topics raging from rants, deals, sports, the Internet links we send each other, and more nothings. So, we are sharing this blog as our virtual Monk's Coffee Shop.
Boston.com lists a few things on how to mess with your perception without any drugs.
Now if you will excuse me, I need to get some ping pong balls and a radio.