Earn 2 miles per dollar on purchases. Redeem miles (at 1 cent apiece) for credit on your statement against any travel purchase, with none of the restrictions of airline cards.

Iavor Bojinov, David Holtz, Ramesh Johari, Sven Schmit and Martin Tingley Anton Skornyakov Max H. Bazerman A roundup of Harvard Business Review’s most popular ideas and advice.