I already thought I had more than enough credit cards, but I'm going to be spending 5 months abroad starting next month, and with the 0% introductory APR's running out on all of my credit cards that offered it, I thought I might want to apply for a card just in case I need to carry a balance while I'm not working for the next five months. So, after some research, I decided on the Barclaycard Arrival. I plan to use this card for a year to take advantage of the 0% APR, $400 signup bonus, and effective 2.2% rewards. I will probably close this card after a year, as I don't spend quite enough money to make the return better on this card than my BankAmericard Travel Rewards (though it's close).
I also travel quite a lot and I think this card will come in handy for me this semester. And, now I have a World Mastercard, to boot!