I normally search for event ideas which are out of the ordinary and out of the box. I learned that Youtube is a good source for this kind of ideas. All you will have to do is browse Youtube and do a search for "birthday party tips" and you can find hours and hours worth of video clips with many different excellent tips. The problem is, who has the amount of time to see them all? So I am on a continuous quest to put together some notes in order 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
I hope you find a number of good tips for your future event on Youtube!