2.1 Swing through the ball.

The golf swing should be in one smooth motion picking up speed along the way. For the higher handicappers, they tend to slap at the ball causing the club head to slow down through impact. This would cause poor contact. Try swinging with you head cover or invest in some club weight that can be attached to your iron head. You can learn to accelerate the club through the hit by practicing to hit with these resistance. The resistance will force you to drive through to a full finish. 

2.2 For balance, hold your finish.

It is important to hold your finishing position until the shot ends. You should be able to do it without tipping over or shuffling your feet or shifting your body incorrectly. Take some time to analyze how some of the professional golfers finish their shots. You will be amazed how much your transition and tempo improves when you start focusing on the finishing.

2.3 Posture is key to solid shots

For good posture, there are few things that you must remember to do. 1. Stand  all with your feet and your toes should be turned out slightly. 2. Flex your knee a bit and stick your rear end for stability. You should almost feel like you are sitting down 3. Try to keep your backbone straight throughout the swing