At least once a year review ongoing expenses such as auto insurance, home insurance, cable, electric. Often new plans are available that are not advertised.
I checked a few other companies for comparative prices and then called my insurance company and was able to reduce my auto insurance by $100 a year. As an added bonus, my deductible is decreased by $100 each year there are no accident claims. The maximum deductible reduction is $500. There is also a 5% rebate every six months if no claim is filed. Well worth the phone call.