The Legend of Zelda: Twilight Princess Cheats
Do the star game in the town square (helpful hint: better to do this once you have double claw than only one).
Extra bomb bag
One way to get one out of the three individual bomb bags is after unfreezing the zoras keep with the big magma rock there is still the rock at the bottom of the water pit in the zora's throne room. use water bomb to break it open. inside there is a goran, he thanks you and gives you a bomb bag in return.
Final boss, quick and easy
just bring out your fishing rod in the middle of the final boss battle and ganondorf will stop attacking. you can attack him three times before he starts blocking again.