We all know that a birthday deserves a celebratory acknowledgement, but many folks have trouble figuring out what to write in a birthday card other than the obvious 'happy birthday' phrase. Thankfully ...

The card's rewards structure isn't the easiest to remember. But its useful bonus categories, flexible rewards and outstanding welcome offer make it a top contender among cash-back cards.

Earn 2 miles per dollar spent on most purchases, and receive a slew of travel-related perks, including airport lounge access.