We usually have a party that's not huge-- a few more than 15-20, but certainly not 100+. It might help gain more responses if you have specific questions about themes, food, activities, and so on. Also helpful-- whether you have a tight budget or not, whether you already have a theme picked, what sorts of interests your friends have (Is booze key? Do they like intellectual challenges? Are they physical/sports oriented?) Meantime, you might have some fun looking through already-existing threads on various party themes. That will give some ideas of what has worked for other people.
I hope it works out well and that you and your friends have a great time!
I hope it works out well and that you and your friends have a great time!