If you have a Discover Card you may be interested in redeeming your Cash Back for Enterprise Gift Cards. Currently Discover will allow you to redeem $20 Cash Back Earnings for a $40 Enterprise Gift Card.
I'm planning a trip to New Jersey later this month and will need a rental car and came across this deal. The terms of the Gift Card does require you to make your reservation with a special promotion code. I noticed the total amount due for my car rental increased by $5 so I am actually saving $15 instead of $20. Still a very good use of Discover's Cash Back option.