/rtp (Random teleport somewhere on the map, radius depends on your rank)
/land player [name] (shows some info for all players, like when they were last logged on, their total playtime and how many chunks they give in claims)
/bmpc (toggles your player-blip on the map)
/homes (shows a list of current homes you've set)
/tpahere (TP player to you)
/tpask (TP you to player)