How about,

-Moon phase, the more moon the less game you may see during day light.
-Wind direction and speed
-Any weather fronts comming or going, barametric pressure changes can be sensed by game so they adjust there days accordingly.
-Temp. . too hot like here in Texas. . .things can be real quiet.
-Rain and or amount of cloud cover
-What did you see? and from where did they arrive.
-What mood were the animals in, calm, skittish, etc.
-Day of the week. . .many times if you hunt a place where the most preasure is on the week ends things may be best come mid week after things calm down a bit.

Also you may add in things about yourself, scent control, shower status, did you get winded by them, spook anyone, get seen etc. did you see or hear anything on the way to the blind or hunting area? What time do you arrive? How fast do you move around?
Any other hunters around, this is a biggy.

Do this for a season or 2 and you will learns lots.