Stop doing dumb stuff.
Careless errors cost consumers billions of dollars each year, experts agree.
Admittedly, each mistake is likely to nick you just a small amount. But repeat that mistake over and over, and you're losing a small fortune. If you do, cut it out. It may not make you rich, but you'll feel a lot smarter. They're so easy to avoid, particularly with the bounced-check protection that 70 percent of the nation's banks offer their customers.