Instructions
Navigate to a website that provides "Minecraft" server listings such as Minecraft Server List, MinecraftServers or Planet Minecraft (links in Resources). Scroll through the lists to find a server that matches your playing style. These lists typically include the number of players, game style and other information about each server.
Take note of the details listed for "IP" or "Address," as this is the information you'll need to join the server.
Launch "Minecraft" and from the main menu click "Multiplayer."
Click the "Add Server" button and then enter the IP or Web address you obtained from the previous steps in the "Server Name" and "Server" address fields.
Click "Done," and then click the name of the server from the "Play Multiplayer" screen.
Click the "Join Server" button to go to the server.
Press "Esc" and then click the "Disconnect" button to leave the server. Click "Add Server" to select and go to other servers.