Don't be afraid to shop around for prices. Company rates can vary drastically. It may save you a lot of money. Let your regular insurance company know that you are shopping around. They may be more flexible with your rates, especially if you already have policies with them.As a last resort, you may want to consider buying insurance from a mail order insurance company, but check their background and make sure they are legitimate. It is usually cheaper than your local insurance agent.As a final note, most auto insurance policies transfer over to a rental car automatically if it is rented in your name. Before you waste $7-15/day in rental insurance, call your agent to see if this applies to your policy.