Here's an hour long video that I recommend because it is QUITE interesting. Maybe not watch the whole thing because it's so long, but watch through the ESP game.
Now. . . go play the ESP Game.
When the picture pops up, just start typing words that have to do with the picture, as long as they aren't "Taboo Words." When your guess matches your partner's guess, you get points. The goal is to get as many points as possible. SO ADDICTIVE! Plus, the whole point of this game, is that the words you agree on are used to label the pictures on Flicker.com and Google images to make searching for images more accurate. SO FUN! go play now. . .