There are dozens, if not hundreds, of books on this topic. I'd recommend going to your local library or bookstore and finding a book of resumes. Follow those examples. Ask friends to give you feedback on it.
Good advice from Mark: get others to comment on it. Be prepared to take what they say with a grain of salt since it's all subjective, and don't feel hurt by an comments. A view from a fresh face is the closest you'll get to the real thing without sending it in and asking for feedback