I must credit my circle of friends for fiendishly showing me many of these. The ones that were my own idea are fairly obvious.
1. Google people you know. Now combinations of people you know. Combinations of people you know and Kevin Bacon.
2. Try to outlast the Amazon Recommendation engine. The game is to keep refreshing your recommendations by marking what you own or are not interested in until you are offered a page where you don't refuse anything.
3. Try to stump Netflix. I'll give you a safety: they are not stocking Carl Sagan's Cosmos. But Amazon is.
4. Look up "Jodie Foster" on YouTube. Watch long interviews in French even when you can't understand a word. [this is 20 minutes long. Vous avez été avertis.]
Discover that she gave the same interview on Ellen and you didn't miss much.
5. Translate phrases into Japanese, then back to English. Get childish giggles
6. GoogleEarth. Damn, that's entertaining. Fly from your childhood home, to college, to your first apartment. Try to spy on the Crawford Ranch. Does it seem pixelated to you?
7. Dial-up blogs on the Blogger Randomizer
8. Library of Congress Memory Page
9. Browse movie gaffes
10. Make this list