Please visit the Terraria Community Forums for help on where to find a special item, tips on how to beat bosses, new release information, and more! It is the place on the internet to go for all things Terraria. Thousands of players -- including the game's developers! -- gather here every day to chat, share hints, and help each other out. It's a great community that we encourage you to join!
The Official Terraria Wiki is also a fantastic resource, chock-full of valuable information, all written by some of the most knowledgeable Terrarians around.