Spawn on tutorial island on first login
My suggestion is to make it so that on a users first login, they spawn on the tutorial island, because i know a vast majority of people miss it, a lot of people spawn and see all the awesome things in front of them and walk straight forward, missing the pressure plate teleporters, most players that are new to the server wouldn't realize a pressure plate would teleport them, they may think its decoration.
I'm suggesting this because i myself didn't find the tutorial island for a few days after i joined when i was just exploring the spawn world.