OK, this site isn’t really fun, but it could be helpful, and it does relate to fun things like vacations.
Onebag.com is “packed” full of tips for traveling light, or at least lighter. Speaking as the world’s worst packer, I can tell you that this site will help you lighten your load on vacations or business trips. If you have trouble going on an overnight trip without taking four suitcases, check it out.