I often suggest that your eyes focus right where the club is sitting at address or on the back of the golf ball. Keep this focal point until impact. Basically, if you wait to admire the shot there will be more to admire. A second piece of advice would be to concentrate on feeling your left arm pulling down to the back of the ball. This should happen at the top of the backswing as you transition to the downswing.
Many players start the downswing with a swing that immediately starts an upward motion.
The move of the left arm should be down to the back of the ball and then out to the target. I have difficulty with consistency on this. Tenn. A. David, many players experience this problem of consistency because of the lack of the upper body and lower body working together. The transition from the backswing to the downswing is a timing move that requires a certain amount of precision. Many concerns with consistency result from the lack of a good lower-body turn on the backswing.