I regularly want event tips which are unique and out of the box. I think that Youtube is a terrific resource for this sort of ideas. All you will have to do is head to Youtube and perform a search for "event ideas" and you are going to find many hours worth of videos with lots of very good ideas. The trouble is, who has the time to see them all? So I am on a continuous mission to put together some notes so as to save me and perhaps others some time.
Here is a great video with some insane party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
I hope you see a few great tips for your future event on Youtube!