practice how to shoot from non-traditional stances.

Practice shooting without standing up. Bucks can just pop in fast through cover.
Put a stand up and put a target behind you on the right and left and try turning around and shooting on both sides of the tree. Deer just roam some times with browsing. They don't always take the trail you want them too
Think of where the deer could come from and practice being able to shoot from your stand that way. After you hunt more, you'll have a deer come through where you are not ready for, or comfortable shooting. It is best to pass on these unless you have practiced for them. Tracking wounded deer over a day or so sucks. Once you loose one, you have those "should I take this shot" thoughts.

You don;t know how many times I have heard "I saw a monster buck 20 yards behind me and I couldn't get a shoot I felt comfortable taking." Deer will not always give you time to stand up, get into position, or walk by perfectly broadside.