If you could only offer one piece of advice or one thing that you have learned through the years of hunting to someone, what would that little gem be.
#1 Equipment related
#2 Hunting style, tactic, or attitude (the mental side)

My equipment advice would be to take your time and research the products you intend to purchase as much as you can and don't skimp on quality if you know you will be unhappy with the lesser.

As far as the mental side I would say get out as much as you can and seize the day as it may just be your last. I have been reminded of this fact too many times recently.