If you don't have insurance, discount drug cards can save you a decent amount on prescriptions every month. They don't work on every drug, and the discounts on brand name drugs aren't that much (it's much better for generics), but every little bit helps.

Check out these sites to print a card online:
http://www.medsavercard.com
http://www.rxfreecard.com
http://www.yourrxcard.com