* Remember always to be wind aware, because deer certainly are. Rarely, if ever, will a deer approach a stand or hunter from downwind. Therefore hunters should focus their efforts, and eyes, into the wind for their best opportunity to see an approaching or passing deer.
* Scouting is important because deer movements generally can be patterned, and knowledgeable hunters can position themselves and their stands accordingly.
* Knowledge of deer scrape placements can be important, because Minnesota's firearms season coincides with the buck rut, and bucks regularly visit scrapes to see if does have marked them. Bucks often urinate in scrapes, but does rarely do. Instead, does often lick and rub their faces on "licking branches" above the scrapes. Note: Scrapes often are visited at night, so they don't constitute sure things for hunters. Also: In my experience, bucks often check scrapes and their overhead branches quickly and move on just as quickly, so hunters need to be alert.
* Deer generally aren't alarmed by sounds they regularly hear, even man-made sounds. But a hunter's sudden cough or a footstep that cracks a tree branch can send a deer scurrying. That said, deer sometimes can be stopped momentarily so they can be shot if hunters whistle softly or issue a grunt-like sound.
* Whitetails that are shot and hit poorly sometimes must lose 35% of their blood before falling and dying, which is why trailing wounded deer long distances is sometimes necessary. Similarly: I once shot a buck through both lungs, also striking its heart, and the animal still ran 91 yards before falling. This is why shot follow-up is important, even if a hunter is uncertain whether an animal was hit.
Deciding whether to shoot, and when, is a critical component of successful deer hunting. Preparation is key. Once in a stand or other position, a hunter should adjust his or her scope, reaffirm distances to certain landmarks, ensure wind direction and, as previously mentioned, check for ways a rifle or shotgun can be supported, or braced, if a shot presents itself. All of this assumes the hunter won't freak out if a deer shows up — not always an accurate assumption. In this environment, mistakes can be made, and often are, because big-game hunting requires physical and mental skills in combination, as well as self-discipline. Most important: Keep safety first and foremost.