TEEN PARTY HELP!!!

I used to always have the best parties at my old school, but now I have a friend who throws great parties. Because of that, I decided to be a guest instead of a host for a while, but now I can`t think of any cool parties. Yup, I`m back in the buisness, but as a 12 yr. Old, not a ten yr. Old. So now I have to find a way to have an awesome party that is inexpensive from now to December. Please help! If you can, email me at simcrazy5@yahoo.com, but if you can`t, just reply this message. THANK YOU!!! PLEASE POST THINGS HERE!