I usually hunt for event ideas that are unique and out of the box. I think that Youtube is usually a great source of these types of tips. All you have to do is browse Youtube and perform a search for "party suggestions" and you will find hours worth of online videos with various outstanding tips. The issue is, who has enough time to view them all? So I am on a constant quest to gather some notes 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
Hope you find some great ideas for your next event on Youtube!