for f%*#k's sake.. you're having a fecking party - make sure you have some booze, make sure everyone brings some booze, forget about keeping the place tidy, get a geeky mate with good taste in music to man the iPod and have fun!.
Some personal house party favourites are:
1. Make sure you have a tray on the stairs for the stair-luge world championship.
2. People tend to like to set fire to shit so make sure you have some fireworks handy in the yard.
3. borrow/buy a video camera
4. tell all the hottest birds to arrive at least 45mins early then ply them with cheap vodka so they are turbocun##d before all your lame mates arrive.
5.post pictures on SF on Monday.