The government has several website to help you learn how to save/spent/invest wisely, as well as avoid fraud, id theft, etc. The best one of these websites is http://www.consumer.gov/yourmoney.
There are links from there to a number of usefule websites. My favorite is MyMoney. You can go to the website directly at http://www.mymoney.gov.
Make Sure Ebay is Actually Making You Money