Wear your socks inside out for a whole day.
Get some coin roll paper from the bank and spend a week or two gathering your change up in a jar, then spend a few hours rolling and sorting the coins. I find counting out the change and then putting it into the paper rolls an excellent form of meditation.
Write a limerick about the first person you see online and email it to them.
Write a letter about everything you did today and mail it to yourself.
Write a letter to the company that makes cracker jacks and see if you can get a free prize.
Go to the mall and try to find the store that sells the largest pair of socks.
Visit Pioneer Courthouse square, find a name on the donation bricks, then google that person when you get home.
Try and find your heaviest set of clothes by weighing yourself on the bathroom scale while wearing different outfits.
Get a pair of dice and go to the library, use the dice to pick a random aisle and shelf, then read a book from that shelf.
Start your computer's defrag system and see how much of your house you can clean and organize before it finishes. See who's faster! Man or machine (or woman, heh).
Go to the video store and rent the oldest movie you can find there.
Stand in front of the mirror and learn to raise each eyebrow on its own (if you can't already).
Stand in front of the mirror and learn to wiggle your ears.
Hike from the zoo through the Audubon park to the Pittock Mansion.
Make Jello and suspend some sort of funny thing in the middle of it. when the Jello is done upend it onto a plate and take a picture for us all to see. (most people put fruit in the Jello like this, on the TV show The Office the put a stapler in Jello).
Buy a sunday newspaper and a roll of scotch tape. See how big of a paper chain you can make!
Buy a flavor of koolaid (or other colorful, non-carbonated beverage) you've never had, mix it up and poor it into an ice tray, put celphane over it, put toothpicks in to make a mysterious frozen treat. Do not spoil the surprise by drinking the rest of the Koolaid first!
Try and make a photo timeline of yourself by finding a picture of yourself for each year you've been alive without using school portraits.
Learn the lyrics to a Beatles song you don't already know.
Send Tom a dollar in the mail!