Vote
Voting takes a few seconds per site and pays out in-game every time: a Vote Crate key and claim blocks per vote, plus a bonus once you've voted on 6 of the 7 sites in one day. Use the same Minecraft username on each site you're asked for one.
MinecraftServers.org
Vote →
Minecraft-Server.eu
Vote →
Minecraft.Buzz
Vote →
Minecraft-MP.com
Vote →
Minecraft-ServerList.com
Vote →
Minerank
Vote →
Minecraft-Server-List.com
Vote →
In-game, /vote shows this same list without leaving Minecraft.