I've hunted on one tract of land for over 20 years. I keep a map of the property with all kills, by everyone, each year. A visual marker on the map indicates the hunter, and deer (8pt, 6pt, doe, fawn etc) taken.

I've taken over 40 deer, and to recount each and every one is difficult off hand, but when I look at the map, I can recall the details of not only every one of my deer, but much of the several hundred taken over the 20 years since I've been keeping track.

If you hunt one piece of property every year, this kind of data collection can be very usefull as well.