Lol. Simbad, can I be an admin on your server? I got some good Ideas actually... not kidding. I'll give you some for free. Heres one:
THis idea is a mini game. Its a plane race minigame for 1.0. The Idea is that all players, when entering/starting a minigame, start in a whjole new map with only a run way. In the map, there are big hoops which can fit 5 airplanes side by side. The point of the game is for the players to have a race through the hoops. They have 3 minutes to get past 5 hoops that are spaced a part. The winner gets 1k or so.
Its a decent idea. I bet ya it would attract a few 10s of people.