Ensure your home is the right place to host the party- Apartments are really a no for 21st's and could lead to your neighbors being grumpy with you for a few months after the party. Make sure that if you are having it at home that you informs the neighbors about the 21st when it will be, and if appropriate, ask them over to join in the celebrations. You can search for Ultimate Tween Spa and Party Place for Girls if you are looking for organize a birthday party.
This will ensure that you won't have problems with complaints and the possibility of a police drop in due to a noise issue. If you can't be sure of this, it might be a good idea to have the party at a family members or friend’s house.
Food is generally the biggest cost for any party. However, with the right approach to the food, you can still have a nice spread without spending a lot of money. It's best to serve a buffet so guests can help themselves, and parents can choose what their child eats.
You can always pre-buy foods to just reheat and serve, but it's generally more cost-effective to prepare your own. If you stick with preparing finger foods – baked chicken nuggets, mini pizza bagels, and the like – your cooking duties will be minimal, and there will be something for everyone to enjoy.