If you’re going to rent a car, comparison-shop heavily. Prices differ a bunch depending on company, current demand and location. Don’t hesitate to pit companies against each other. And ask as many times as possible about special deals, promotions, coupons, and any source of potential savings such as membership in AARP or AAA. Even while you’re standing at the counter waiting for your reserved car, it’s not too late to ask for a discount or free upgrade. Sometimes a smile and a simple request will do wonders.