Clothing - The pattern of the camo is not that important. All that matters is that your outline is broken up.

Calling - I've done a little rattling. Use a doe estrus scent and a lot of deer will come in downwind, even when they have smelled me in the area.

Stalking - I usually stalk upwind in the middle of the day when I know conditions aren't going to be favorable for an afternoon stand hunt. The deer will be bedded down, and the wind carries my scent away and muffles my sound to some extent.

Shooting - Practice, practice, practice. Use a rifle that you don't mind practicing with and can shoot well. Some people can shoot the big magnums. More power to them. Others don't shoot them that well. A smaller bullet in the right places kills many more deer than a big bullet in the wrong places. Also, try to simulate your shooting positions when your practicing. If your not going to be shooting from a benchrest while hunting, don't shoot from one when practicing. Learn your limitations at the range, and that will keep you from making bad shot decisions when hunting.

As with everything, experience makes the difference. The more you hunt, the better you will get. Also, asking questions like this helps a lot. Learning from other's mistakes helps keep you from making the same mistake.

Good luck, and good hunting!