I use a calender with large date boxes. After every hunt I scribble a few notes about the hunt on it. I write where I went, the gun I used, the game I bagged, and my overall impression of the hunt.
Well before I started dragging my boy's and girl out with me I started taking some notes, but have since relugated that idea to the recycle bin. I use a camera... I have a scrapbook of pictures I call "The Book Of Dead Critters". I have over the years, beenlucky and skilled enough to have many pics, more than I care to scan and download at this time, I soon better put them on a CD, in case of fire or something.
More like a range log I shoot long range a good bit. The same place i hunt wind speed. areas i see large hogs dates of bad crop damage.Ranges to heavy used trails from my spot. have to say its helped more than once.
I do. I'll keep small notes with dates,times and moon phases I hunted. Also keep a running record of kills. You can go back and review the notes. There are clear patterns as to deer movement and buck sightings and harvests. Certain times of the year are clearly more profitable than others.