Most of this you probably already do and or know, but here goes. I really improved my hunting from the way I was taught growing up by reading. Learning what attracts and or draws deer into an area is key. Look for funnels, saddles, and pinch points. That is always where I start when scouting a new area. I even use topo maps and sometimes you can tell a lot from looking at your hunting area with Google Earth. Once you find a saddle, funnel, pinch point, etc try and locate where the deer are bedding and feeding if possible and you will know where to sit or position your stand. Acorns are a huge factor in seeing deer early season. Now as far a killing a buck..........early season position yourself in one of the stands you selected near a food source or bedding area and cross your fingers. Now if you can get in close to a bedding area without spooking the deer I have had my best luck early season catching bucks going to and from bed straight to whichever white oaks are dropping the hardest.
The rut! Hunt everyday all day. Several bucks I have taken have been mid day when most people are at home. Same deal with the bedding areas. Get in close and you may find a buck sliding in a bedding area looking for a hot doe.
Most important thing to me is put as many hours as possible on stand. And don't shy away from thickets. You will learn they will be your friend.