All of the advice and links (like the Kentucky Afield myself) will really help you. The only other advice I could add is just to slow down and take your time while field dressing the animal. It only takes the stomach to be split open or the bladder to splatter everywhere once to make you dry heave a little and learn a lesson. Personally, I enjoy field dressing the deer - nothing says success like a steaming gut pile on a fall morning!