With gas prices at record levels, everyone is looking for ways to help save money at the pump. An indispensable guide, 75 Ways to Save Gas is packed with simple and easy-to-do tips to increase the fuel efficiency of your vehicle and lighten your environmental footprint at the same time. For example, did you know that nitrogen maintains tire pressure much better than air, which translates into burning less fuel? Or that a loaded roof rack or carrier can decrease your fuel economy by 5 percent? If you want to save money, this is required reading before your next road trip.

Jim Davidson is the president and founder of Car$mart Inc., a Canadian car brokerage firm. He is frequently asked to comment on the auto industry on TV, on radio, and in print. Jim lives in Toronto.