Start with soft calls
When calling to a deer that you can see start off with soft calls. Continue to call, getting progressively louder, until the animal hears you. Once you are sure the animal has heard you, gauge what to do next based upon his reaction. If he stops and looks your way, then continues in the direction he was travelling give him one more call. If you get the same reaction, let him go. It is better to try him again on another day rather than educate him by calling too much. If after hearing your calls he starts to come your way, do not call again. Deer have an amazing ability to pinpoint your exact location from only one call.
Sighting in your gun
Secure your gun in a vise or rest so that you are able to hold it very steady. Aim at the bullseye and fire one shot. Now with the help of a friend, again place your crosshairs on the bullseye. Holding the weapon very steady, have them move the crosshairs to the bullet hole by utilizing the scope's windage and elevation adjustments. Once you have the crosshair on the bullet hole you can fire another shot at the bullseye. If done properly this round should be very close to or inside of the bullseye. You can now make any fine tuning adjustments and continue to work on your shooting.
Bend at the waist
One of the main reasons bowhunters miss deer from their tree stands is bad form. Anytime you are shooting down at an acute angle things get tricky. What happens most times is that the hunter draws their bow and then drops the bow arm to get on target. This essentially changes the relationship of our anchor point and peep sight and will often result in your arrow sailing over the buck's back. Next time you are faced with a tight angled shot remember to bend at the waist to maintain that 90 degree relationship between your bow arm and torso.
Pick a spot
This tip not only applies to bow hunting but firearms as well. Anytime you are lining your sights on a deer it is very important that you pick a small spot to aim at. This may be a tuft of hair out of place or just an imaginary "spot". Doing this will ensure that you have a very fine aiming point before taking the shot. Shooting at the "whole" deer results in a lot of hunters going home with only a story. Remember Mel Gibson's words to his young sons in the movie "Patriot". He said, "Aim small, miss small"! This should become a mantra of sorts for us in the woods.