Originally Posted by VegasGambler

Sign up for mileage plan dining. Go to a local restaurant that participates and have a meal (or even a drink or an appetizer or a dessert)

FWIW MP dining is 5 miles / $ once you reach VIP status (12 dines in a year), over and above whatever you get in your credit card. It's a good deal. I often go to new places and find out that they are part of MP dining when my miles post later... always a nice surprise. So, signing up is a good idea to matter what.

Another easy option is mileage plan shopping.