I often search for event tips which are out of the ordinary and out of the box. I think that Youtube is definitely a wonderful resource for these ideas. All you have to do is browse through Youtube and perform a search for "event suggestions" and you are going to find several hours worth of videos with countless good tips. The problem is, who has the amount of time to see them all? Thus I am on a continuous mission to compile some notes so as to save me and perhaps others some time.
Here is a great video with some crazy party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
Hope you see some good ideas for your future celebration on Youtube!