good question.
I gun hunted for many years. When I decided to try bow hunting the first thing I did was take a class. They suggested taking pictures and keep a journal. Because of them, I have taken pictures of every archery kill. In a dedicated scrap book I have a 5X7 picture of the animal and a paragraph or two about the hunt. Location, date, species, gender, bow, broad head, shot distance, shot placement, penetration, quality of blood trail, distance of recovery and any unusual details I wish to remember.
Joe