Buy a few games ... most by now have trophies especially the newer games so buy some games and use this website to help you figure out what you need to do to get the trophies for a game http://psnprofiles.com/ also Youtube will help you out for those trophies your having a hard time with just search the trophy or the game on youtube
thanks chris for helping me out.
FOR ANY HELP (SPECIALLY NEWBIES, ASK THE MVPs OR AT FAQ OR CAN ASK ME)
ALWAYS FOR HELP
NEVER UNDERESTIMATE OTHERS
When looking for assistance in getting the trophies through any particular game you can always check out sites such as PS3trophies.org or PS3trophies.com, both of which provide a detailed rundown of how to achieve 100% in a game for the ultimate trophy, the Platinum.
You might also notice trophy guides listed around the PlayStation.com message boards from our very own MVPs here. Whether you're in need of polishing off Persona 4 or have an itching to scratch off every one of those trophies in Ratchet and Clank: All 4 One, every once in a while there's come a trophy guide inbound from one of the MVPs.