Andrea Woroch, a money-saving expert, says a lesser-known tip is to purchase discounted Uber and Lyft gift cards and use them to pay for your rides. You can find them through resale sites like Raise and warehouse stores like Sam's Club. "Wait for a sale on these to score them for even less," Woroch said in an email.

Uber wants to be more than your airport ride. New features aim to turn the app into a one-stop shop for hotels, room service, shopping, and more.