MyNewCostume.com is a great all-in-one site that has compiled a ton of ideas as well as some really great tips. Be sure to check out their Top Ten Tips section as a number of them are quite useful for anyone in the market for a new costume.

GroupHalloweenCostumeIdeas.com is a site geared towards group costumes, obviously. For those of you that want to dress up in theme with your buddies, this site can help you find the perfect idea. They actually have quite a large collection of ideas that should fit you and your friends no matter what size group you have.

HomemadeCostumes.org is a site loaded with simple instructions to create some clever Halloween costumes from basic everyday ingredients. If you're looking to come up with a costume without spending any money, then this site is for you!