I want to the piston trick with sand to come back, you know where the sand would fly in the air? That was so awesome.
Also, put the right-clicking tnt sets it off back, then you don't have to waste time making torches, levers, or buttons.
Another thing Jeb should add is Aliens. Yes. Aliens. So then you can destroy their U.F.O.'s and get a bunch of xp and redstone or diamonds. And when you get abducted you can kill the aliens then loot their futuristic looking chests and travel to another planet using the space ship's map and you just select a planet and go!