One of the most forgotten things was not mentioned, toilet paper!!!! With out fail if you have none with you, you will have to go. If you have a roll you will rarely if ever have to go! Another thing is the toilet paper is excellent for marking blood trails.
Nick mentioned the #1 thing if you are hunting from a stand.
venison4all covered the rest, the lighter the better.
trapperdave is correct when it comes to piss, deer do not spook at human urine.
One other thing was left off, extra batteries for the flashlight.
The Tazman aka Martin Price
Founder and President of
Virginia Disabled Outdoorsmen Club