-Think of all of your abilities, even preform them if neccesarry. It could be possible that you may have to use one of these abilities to solve the puzzle.
-Watch cutscenes. Some people don't watch them, and it just stresses me when they get all confused about something that was explained in detail in the cutscene they skipped.
-Do another challenge/side mission. You may need to complete another task or have a certain level of experience (if it's an RPG) in order to access or complete the challenge you're stuck on.
-While this rarely works, talk to NPC's. They occasionally can help.
-If you just wanna be lazy and not think like you're supposed to, cheat and use a strategy guide. You must be aware, though, that this can take a lot of fun out of the game and provide spoilers. It could even take you on a path you don't want to go on (i.e. collecting bonus items you aren't interested in like badges, etc.).
-DO NOT USE CHEAT CODES. They alter the game and make it easier, but it can really take away from the story's experiece and cause you to miss out on a lot of cool stuff. If you're gonna cheat, at least do it on a second run through the game.
That's all I've got for now. Hope it helps some of yous.
