I'm only a high school sophomore so correct me if I am wrong please, but I believe that the three I have listed are the things you do right after graduating from medical school if you're planning to become a trauma surgeon. Even if you're not specifically going for becoming a trauma surgeon...
critical care fellowship
general surgery
general surgery internship
general surgery residency
traumafellowshiptrauma surgeon
trauma surgery
trauma surgery internship
trauma/critical care fellowship
