Clark frequently fields one question from the public when he's on the road during his book tours: "When is it right for me to lease a vehicle?" With the leasing market up about 25 percent year over year, it's a great time to address this question again. There are two circumstances when doing a lease is acceptable: The first is if you like new wheels all the time and you only want to worry about gas, oil changes and routine maintenance on your vehicle. Then it's OK to lease a new car every two or three years, but no longer than that. The second instance is when luxury automakers offer factory-subsidized leases where they eat a lot of the cost. Luxury automakers hate to cheapen their brands with a bona fide sale, so often they offer such leases to help move extra product. But other than in these two circumstances, don't lease. And stay away from four or five year leases unless you want to face financial Armageddon, Clark says.

Meanwhile, the strong growth in leases means that in a few years there will be great deals on two and three year old cars when they enter the used auto market. Clark is a big fan of used cars, but be aware that you must always have them inspected by an independent mechanic before you buy. Finally, beware of one cousin of the long-term lease -- the balloon loan. This is the kind that starts with an extra cheap monthly payment, but at the end of five or six years you may owe the lender up to $10,000 or even $15,000. And by then, your vehicle's worth won't be able to keep up with that inflated balloon rate.