I did this 3 years ago and found nearly $300--what a nice surprise!!
Like looking under the cushions of the largest couch ever, unclaimed.org
is a way to search for money that you've forgotten about or over looked. Pick the state and that will connect you to the unclaimed property search page for that state and you can start looking to see if you have any old checking and savings account, forgotten pay checks, safe deposit boxes, or trust distributions that are due to you.