Let's put it this way: you cannot really change most factors that drives auto insurance premium, like your age, driving history, car make, etc., but you have the weapon of comparison shopping at your disposal. Oftentimes, if you do an online premium comparison, highest and lowest premiums can vary by as much as 40%.

It pays to mix it up

Call a couple of the larger carriers (State Farm, Allstate, Nationwide, SAFECO, etc.) and then check with a couple independent agents and phone-based carriers, such as GEICO or Amica, just to make sure you've covered your bases.

If you prefer to shop on the Internet, a number of services offer online price quotes. Web sites give you quick access to a number of quotes without ever picking up the phone. However, as convenient as they are, it's still advisable to consult other more traditional sources as well.

What to look for

When buying auto insurance, it's important to consider not only the price, but also the carrier and the coverage. As with any product, the value of a low price is quickly forgotten when you find out that the service or the quality of the product is not what you expected.

The old saying, "It's too good to be true" applies for insurance premiums as well. If the premium seems too low, be sure that you are getting all the coverage you need.