Photo: Thinkstock

3 of 6
Cell Phones
How much you can save: $29
How to do it: Head to BillShrink.com, a site that analyzes your wireless usage and tells you which parts of your plan to jettison in order to spend less. Whether it's by changing data plans or taking a step down in text messages if you also use iMessage or BBM, BillShrink saves its average customer $29 a month on a family plan.