This card pays you back for the things you probably buy most -- gas, groceries and drugstore purchases. The rebates on those items are a generous 6% for the first year you have the card, then drop to 3%. (Other purchases earn a 1% rebate.)
The money really adds up quickly, and the best part is that if you sign up for a separate "Options" program, you can get paid back for all repairs and service on your car -- up to $5,000 per visit. Oil changes, tire changes, inspections -- no service is too minor to qualify. You can also get rebates for car purchases or leases, although I don't know anyone...