What are some fun things to do for a high school graduation party?

I'm really indecisive and my party is this Saturday. I don't want it to be boring but I'm not sure what people do at these kinds of parties. Any creative suggestions for a fun time? My sister is friends with a DJ who could come to my party if she asked, but would that be weird? Currently weather.com says there are going to be isolated thunderstorms on Saturday so that kinda knocks out doing something outside. So basically... please help. Thanks :)