Good Housekeeping has a ton going on right now. I went there to register for the juicer giveaway that I read about in the January issue (yes, I'm 32 and read Good Housekeeping - I have for at least 5 years now). Then I saw they have a billion other ones there. So I've entered every one but the Lowes holiday lights display (we don't decorate the outside of our home) and the Binaca breath stuff (don't use it). Well, I also didn't enter the Walmart holiday bills giveaway - but only because it's not taking entries any longer (that ended 12/15).
While on one of the forms, I saw a side link to Philips Sonicare giving away free dental care for life (a $25,000 prize that can be used toward dental care). Since we're losing our insurance after this month, that really piqued my interest. And this is one that can be entered daily through 12/31 (the GH contests are all one entry only).
Go enter some contests... and good luck!