If you want to get into a pool for free Just say your Mom is in there and she's looking for you, if your old just say that your son is in there.
If you want to watch 2 movies for the price of one just go to the bathroom when the movie is almost done and then go into the next movie.
If you want free food from a fast food joint just go there in a car go through the drive through and say that they didn't give your cheeseburger etc if they ask for reciept tell them your dad brought it home and a cheese burger was missing, walaa free food ftw.
I have one that lets you get into Six Flags for free but I won't tell it =P