Find a really popular person and get them on board. If you already make small chat, let them know that your parents are out of town and you wanna throw a party. Once you've got a partier on board, they can be in charge of getting the people there. Set up a private facebook group and invite who you want to come. Know that popular people are less interested in coming, so invite some normal/losers. If you can get a guy who's strong and athletic, but not really popular to man the door to get the $5 cover during the first hour 1/2 of the party.
Then you need to get the booze. Get an older friend/adult to go online to a brewery's website and order a couple of kegs. Get some people to pitch in ahead of time and let people know that there's a $5 cover charge at the door to pay for booze. Tell people to BYOB (bring your own booze), let them know that hard liquor is on them if they want it. You're not really gonna get a DJ for free with their own sound system, but if you know a kid in your school who is really techie and not a total loser, get him to DJ or make your own party playlist on iTunes with help of this popular friend to check out the music choices. You're gonna need to shell out initially for the kegs, but you should be able to get it back. You need to buy a bunch of chips snacks. Go to bulk barn and it should cost like $10.
Find a way to lock your parents' bedroom because if anything is moved around, they will notice, and lock all of the breakables and expensive antiques in their room or another room that locks. People have been known to steal xboxes and ipods during parties so make sure those are locked too). Move the furniture. Push the dining room table up against the wall and put snacks on it. Bring the chairs downstairs. If there's any other big furniture in the middle of the floor, push it against the wall or move it. People want space and less things to ruin the better.
Always have a drink in your hand, but never get drink. Only drink 2 beers. If things get out of hand, you want to be sober, but it's ok if you act a little drunk. Try to stick around with the initial popular person who helped plan the whole thing, but you also need to play hostess. One of the super dangerous parts about having a party is that you can't really control guest list. People bring friends and they can be really sketchy and older. They can be scary, and they will just walk into your house and they may bring drugs. Just try to be aware, but you can't really make them stop doing drugs or make them leave.
Know when your parents will be home and give yourself an entire day to clean up the house. There will be a crapload of beer bottles, cups and other trash all over your house. You need to pick EVERYTHING up and drop off the garbage bag in a park's garbage bin so your parents don't find it. Clean all the sheets (washing machine) and try to scrub couches, because the beer smell will be in there otherwise. Put back everything you took out (breakables and electronics). Do a sweep around the house for moved furniture and moved trinkets because people are prone to move things randomly (or break them). Sweep and mop the floor. Frebreeze the **** out of the entire house, including pillows, couches and carpets if you have them. Fabric holds smells, so wash if you can, but febreeze can help. If your parents ask, tell them the neighbours fertilized the lawn and you accidentally left the windows open. Pay back the adult who bought your kegs for you.
Throwing a party does not guarantee popularity. i know a guy who threw the after-prom and he spent the entire time playing host- refilling beers, chip bowls and not enjoying himself. People had lots of fun, but his status didnt' improve. If you're playing hostess the entire time, you're not making friends so balance the two. Spend time casually with the popular person/people who helped plan the party once you get back to school. Keep it slow and casual and then slowly start hanging out with the group as a whole.