2) Bother People At Their Work: Its fun to call toy stores and ask them to see if they have stuff in stock. For instance "Hi...i was wondering if you had a purple barbie convertable? with sparkles?" and then they have to go have someone run around the entire store and see if they have it in stock. Make sure you're as specific as possible. If you just ask if they have Barbies, they'll say "yes" off the top of their heads. But if you ask for a "Malibu Barbie that comes with a Kelly doll and towel and sun-screen and pink sparkle glasses" they'll have to have someone go look. When they get back with the answer to your question, ask them for more stuff.
3) "Your Chinese Food Is Ready": This is a personal favorite, but you have to be able to fake a very thick chinese accent. Call someone up (using the accent) and tell them that they're chinese food is ready. When they say they ddint order chinese food, argue with them (i.e. "YES YOU DID!!! YOU ORDER SHRIMP FRIED RICE AND GENERALTOU CHICKEN!! YA YA YA!!) until they eventuallly hang up.
4) "Your prescription is ready": My friend likes to do this one alot...call someone up and act like you're Ben from CVS (or Rite Aid or a Super Market with a pharmacy or whatever) and tell them that their perscription is ready. When they say "i dont have a perscription there" argue with them and threaten to get your manager. But the key is NOT to act mad...stay completely calm the entire time. Also, if you get an answering machine, leave a message.
5) The QVC Call: I've always tried to call QVC and claim that i bought their product and loved it, and ask if they can put me on tv. This hasnt worked yet...one time they said "sure hold on" and after being on hold for 10 minutes they said the display people werent taking phone calls...bastards.