Up to three credit cards and two debit cards.
Credit:
Visa - Southwestern Airlines Rapid Rewards card
Mastercard - Capital One no interest card
Discover - Cashback Bonus no interest card
Debit -
Visa - UMB Bank card
Visa - Wells Fargo Card
good job. also, if there is anybody that doesn't have an spg card, then i can have them email you a link that allows you to get 25,000 points w/ no fee for the first year. it's a really good deal and you only usually get 10,000 points when you sign up. pm me your email and i'll enter it into my accout and then they'll email you within 24hrs. lsoc, you should do this and make this your card btw. 25k is a great spg startup bonus and the best all around card for you/pretty much anybody.