For a dress I recommend going to the ghetto. If you are willing, go to the dirtier part of your city/town and find a bridal shop. They usually have reasonably priced bridesmaid dresses and will tailor them to fit if for a small fee. I also suggest going dress shopping several months in advance. I got my first prom dress 5 months before prom and my second one 3 months before. This will protect against any dress matching. If you do this, try your dress on a week or two before prom to make sure it still fits so you’ll have some time to get it fitted. In addition to this, don’t buy your dress too small. It will not encourage you to lose weight, trust me.

Another, more important thing that bothered me is that you suggest to go to the supermarket to get flowers.
DO NOT GO TO THE SUPERMARKET.
The flowers there will fall apart. I have been to so many dances and have seen so many broken corsages. Sometimes you can find a good one at a store, but chances are no. ESPECIALLY if you want white flowers. There is some kind of gas the produce releases that makes flowers wilt. And they don’t have really good florists like a flower shop would. Again, shop around again and try to find one in the ghetto. I know that sounds terrible, but really, it’s a lot less expensive and not nearly as dangerous as you would think.

I have another tip for something to do after prom, go to a Village Inn or a Denny’s or something like that, some place that’s open late. That way, if people drove there together they can be picked up by a responsible adult instead of the limo driver having to give everyone a ride home.

My last tip is about the limo. I suggest talking with friends about limos. One of my friend’s dad drove a limo and was able to give us a ride. See if someone is willing to put down more than you can afford and hitch a ride with them. If you’re fun to be around, they shouldn’t mind, as long as you can pay them back in another way.