I have kept a journal of every deer hunt that I have been on since I started hunting deer in 76. I devised a sheet that includes all the data that I could think of set up in the form of a check list. Date, time hunted, stand location, weather conditions, to include sunny, cloudy, partly, rain (heavy vs light), wind speed and direction, air temps, corn/soybeans up or down, snow depth, snow in woods?, and a section that I can write notes and memories of not only my hunt, but anyone with me that day. I also drew an outline of my farm on the page so that I can mark locations of kills and sightings for that day.
When I read my notes, I can actually remember and visualize the hunt...it's great. Last year I loaned it to a friend with whom I hunt frequently. He thought it was great to go back and remember our hunts together. It amazes me that I have kept up with it all these years.
Keep life simple...if you hear hoofbeats, think horses, not zebras.