The golf swing is very fluid. The constant change means that at some points, the golfer will be quite happy and wish he could bottle his swing and take it out and use it whenever he wanted. But it doesn't work that way. Golfers go into slumps because they do the little things wrong and get into poor habits.
Adjust your stance for accuracy. Over time, golfers can learn a few tricks that might add power and distance to their swing. In so doing, they forget some of the fundamentals for accuracy. Stand with your shoulder parallel to the target line. You may have opened your shoulders to get a better view of your shot, meaning your shoulders would be pointing too far left. This fault affects the direction of your shot.
Check your grip to make sure you are not squeezing too hard. If you grip the club too tightly you will not be able to release the club properly or create enough clubhead speed. Hold the club at about a "4" on a scale of 1 to 10 (with "10" being the tightest) to get the most out of your swing.
Make a full shoulder turn to begin your swing. If your body flexibility allows, you should rotate your shoulders 90 degrees and your hips 45 degrees in the backswing. Let the shoulders bring the club back, not the hands.
Transfer your weight to the left and unwind your hips to begin the downswing. Your hands and arms will follow.