Today's question comes from Sarah, who has a question about earnings per click numbers for online ads. What is a good earnings per click number? How much money can she make with online paid advertising? When is it not worth her time to spend money on earnings per click advertising? Sarah's website is at http://www.probaseballinsider.com/.

In this episode, I mention SEM Rush as a great tool for keyword research at http://www.semrush.com/.

Do you have a question about earnings per click or online advertising? Record it at http://www.askpat.com/.

Today's sponsor is Freshbooks. Go to http://www.freshbooks.com/askpat and enter "Ask Pat" for more information.