How can I win using the free play bonus at online casinos?

I have noticed a lot of online casinos are offering some tempting free play offers. Is it best to try as many diffrent games as you can during the free play countdown (like they suggest) or will I be better sticking to one game. a href="http://www.workfromhomerev.com/" rel="nofollow"http://www.workfromhomerev.com//a