I mostly post on books, but this time I thought I'd let loose and post about my favorite magazines:
Discover - My favorite science mag. I love it even more than Scientific American. $19.95/year through Amazon.
Skeptic - Michael Shermer's skeptical magazine which addresses everything from intelligent design to bigfoot and beyond. A very excellent magazine. $30/year.
Skeptical Inquirer - General debunking magazine, features everything from the shroud of turin to popular medical myths and ghosts. $35/year.
Free Inquiry - Excellent Freethought mag. $35/year.
And signing up for swagbucks is a good way to get the money for these mags. On swagbucks you just use the search engine a few times a day and you earn "swagbucks" which can be traded in for an amazon gift certificate, as well as a number of other prizes. I use it all the time and it has really helped out as far as allowing me to save up enough and then use the prizes to order books. Word. (lol).