I usually look out for event ideas that are out of the ordinary and out of the box. I find that Youtube is certainly a good source of this sort of ideas. All you have to do is browse through Youtube and do a search for "event ideas" and you are going to find several hours worth of videos clips with a lot of awesome ideas. The problem is, who exactly has the amount of time to watch them all? Thus I am on a regular mission to put together some details so as to save me and also hopefully other people some time.
Here is a great video with some crazy party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
Hope you find a few great ideas for your next celebration on Youtube!