A draw is a golf shot that curves gently from right to left (for a right-handed player). With the driver, hitting a draw can generate extra distance because the ball has less backspin and more roll when it hits the ground than a tee shot hit perfectly straight. With iron shots, a draw is useful when the pin is on the far left side of the green. You can start the shot safely toward the middle of the green and curve it toward the target.
Rotate your hands clockwise on the grip until you can see three knuckles of the left hand when you look down at the grip from your address position.
Aim right of your target with your feet, hips and shoulders but with the clubface square to the target line.
Swing along the line of your feet. Your setup will effectively promote an inside-to-outside swing path. Try a technique Masters champion Fuzzy Zoeller uses to promote a draw -- set your hands slightly lower at address. With this swing path, at impact the clubface should be in a closed position in comparison to your swing path.
Allow your right forearm to rotate naturally over your left through impact to put the right-to-left spin on the ball. Jack Nicklaus visualizes the toe of the club moving slightly ahead of the heel as it passes through the impact zone, closing the clubface and imparting the draw spin.