I oftentimes search for event tips that are unique and out of the box. I find that Youtube is generally a very good source for these sorts of ideas. All you will have to do is head to Youtube and do a search for "event suggestions" and you are going to find hours worth of video recordings with lots of awesome tips. The issue is, who exactly has enough time to watch them all? Thus I am on a regular mission to compile some details in order to save me and hopefully other people some time.
Here is an awesome video with some crazy party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
I hope you find a number of great ideas for your next celebration on Youtube!