Find a mechanic you feel good about before your car needs major repairs. Ask friends and co-workers for referrals.

Bring your car into any new shop first for small repairs like an oil change or a brake check and evaluate the overall service they give you.

Bring a check list of what your car needs (and why) whenever dropping your car off. Avoid bringing your car in and asking them to "do whatever it needs".

Talk to the mechanic who will be working on your car. Go for a test drive beforehand and clearly explain and point out the problem.

Get a second opinion if you feel uncomfortable with any diagnosis. It is perfectly acceptable to tow your car to a second shop for another opinion if it isn't drivable.

Request a written estimate.

Ask about the warranty for parts AND labor on any repairs and get it in writing.

Request that your parts be saved for your inspection. Ask before the work begins.

Go for a test drive before paying the bill to make sure the car drives well and/or was fixed to your satisfaction.

Read the bill carefully before paying. Ask for clarification on any charges that don't make sense to you.

Pay with a check or a credit card: you can always stop payment on a check and some credit cards offer protection against consumer fraud