Bryn has been posting ways to confuse Santa. Here's an example:

Ways To Confuse Santa Claus !
Leave a plate filled with cookies and a glass of milk out, with a note that says, "For The Tooth Fairy. :" Leave another plate out with half a stale cookie and a few drops of skim milk in a dirty glass with a note that says, "For Santa."

Check out her site for more holiday fun stuff.