I notice on your profile that you're 17. That's an alright age for your first house party, you're young enough to have fun yet old enough to hopefully be pretty mature and sensible (and I say this as a student at university, so I know what people can be like when they're drunk. Just ask any of my housemates...). I'm 19 now, but was 16 when I went to my first house party. It was an after-show party for a play I was in at my old school, and went pretty well (though I was foolish enough to be drinking vodka straight, I wasn't ill and it was pretty fun, which is more than can be said for one guy who was sick on the carpet, though he learned his lesson I believe).
Anyway, I can give pretty good advice judging by the fact that my housemates and I had a house party in our own home last weekend. Make sure you only invite people who you know, and make sure that they let you know first if they invite anyone else. I say this because my friend who I invited who didn't know anyone else asked if he could bring some friends along from his halls of residence, and I agreed, but made a point of not letting it get out of hand. Fortunately the guys friends were pretty cool and there were only a few anyway, so it was all okay.
Ahem. As I was saying, don't let too many people crash the party. BYOB (Bring Your Own Beer) is also good, as it saves you money and means that people are less likely to get absolutely wasted on free booze (make sure you have some, of course, but not loads). People won't get drunk as easily when they have to pay for the alcohol.
Also, make sure all your doors inside your house are locked, if you have locks on the bedroom doors. I remember one friend telling us before our party that they knew someone who had a house party, and some friends of friends just walked into an unlocked bedroom and took a load of stuff including a laptop, I believe, and walked out. No-one realised until the next day, apparently. Expect a lot of mess, make sure you have stuff to clean up the next day. And for Offler's sake, make sure you choose a good playlist. My friend was in charge of the music for our party and filled it with dance tunes and electro, about halfway through the night a group of us (including me) were so sick of hearing "DUM-DUM-DUM-DUM" bassline beats and whatever the hell was on that ipod that we just hijacked the music and started playing plenty of indie, rock and metal. Some actual GOOD stuff. So yeah, make sure the music is good. Otherwise expect pissed off drunk people hijacking the 'choonz'.
Anyway, that's all from me, have a great night
