I normally want party approaches which are unusual and out of the box. I think that Youtube is definitely a very good resource for this kind of tips. All you have to do is visit Youtube and perform a search for "birthday party suggestions" and you can find hours and hours worth of movies with many outstanding ideas. The problem is, who has the time to see them all? So I am on a constant quest to gather some notes so as to save me and also hopefully others some time.
Here is an awesome video with some crazy party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
Hope you see a few good tips for your future occasion on Youtube!