Does it affect your credit score to open more than a couple of credit cards? I just got an offer for a card for 0% for 15 months and then 8.99% fixed - which is lower than another credit card of mine. I can't resist - but then I have 5 credit cards. I want to keep them open b/c of my credit history.
I think it is most desirable to have just a couple cards. I would call your current card company and ask them to match the offer you've received. I've had success with that.