RE: If you could give one piece of advice?
First, have fun and be safe. That is why we are out there in the first place.
Second, Put the time in the stand and trust your instincts. Hopefully there is a reason that you picked the tree that your sitting in. Trust those insticts and go with them. My buddy did that last year, found a tree that he thought was perfect, hunted that stand a bunch of times without seeing anything, then eventually shot the biggest buck of his life.