Wikileaks, though technically not a wiki, provides an easy means to disseminate information that some find it desirable to share against the wishes of those who find it desirable to keep secret. Aside from the morality of the leaking itself, such a service provides a look into the activities of...
Learn what the power-ups in multiplayer do and make sure you use them to your advantage.
When you're underwater, you can jump much, much higher.
Don't try and get all the hearts, for it's not worth losing a life to get three more.