I really dislike Enterprise Rent a Car. They don’t have any sort of expedited pickup process that I’ve ever experienced, the paperwork takes a long time, and the ritualistic walkaround of the rental car, the theatre to sell you additional insurance, is grating. And I’ve not personally seen any nice cars on their lots. Give me Avis or Hertz any time, and oft-overlooked rental car status, thank you very much.
But if you must rent from Enterprise, I came across a couple of discount codes on Flyertalk recently, no notations as to when they expire. Code ESJ8A3 provides 25% off at neighborhood locations only (not airport locations). And code ERACFRE offers 20% off at all locations when paying by Discover Card.