http://www.minecraftwiki.net/wiki/Minecraft_Wiki Have a question?Wonder how to make something?Wonder what an Enderman is and why in gods name it is staring at you?The Minecraft Wiki has answers to most things. Very useful site.
If you have an iPod, download the application "Minecraft Explorer." This does the same thing as the Minecraft Wiki and is good for quick use if you don't want to pause the game. There is a free version, as well as a premium, with the only difference being the removal of adverts.
