If you're a tinkerer with a yen for fixing cars, you can easily turn your love of tinkering into a profitable sideline by offering your talents to less knowledgeable car owners. You can do this in one of several ways. You can do fast fix-up work for people trying to sell their cars, be a specialist on specific models of cars, do mobile tune-ups or start a backyard car lot.

If you do this work for fun anyway, you'll find this is a most rewarding way spend your free hours, and if you can diversify, advertise well and build up a good clientele, you can operate a car-services business out of your own home and make a good living wage.