I'm running out of storage for my Ubuntu Server. What are my options?

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http://serverfault.com – I have a dedicated Ubuntu Server, provided by OVH. This is my exact plan. I'm not sure how, but I've used up all of the space in the /home directory. df -h shows the following: rootfs 20G 8.8G 9.8G 48% / /dev/root 20G 8.8G 9.8G 48% / none 3.2G 284K 3.2G 1% /run none 5.0M 0 5.0M 0% /run/lock none 16G 8.0K 16G 1% /run/shm none 100M 0 100M 0% /run/user /dev/md3 92G 86G 1.6G 99% /home Java, WebServer (Small one but large SQL database) and two gaming Minecraft servers are using up the space. I (HowTos)