14. Don’t forget the trunk!
(Image Source: diymamablog.com)
Before you call it quits, address the trunk. This is another area of neglect that car dealers frequently examine when determining value. Throw out any trash, check your spare, and vacuum. Use charcoal or baking soda to keep it from smelling stale back there. The average person may never notice, but it’s just another way to maintain the value of your asset.