Where you hit the ball sixty yards and in will make or break your score. Aim at different targets at different distances to get a feel for this control.
Dedicate sufficient working on what you need. This sounds obvious, but it will maximize your practice.
There are two shots that comprise 80% of your short game. Here they are.
When you stand, your hips and shoulders can rotate safely independent of each other. When you swing a golf club, you reduce the amount of rotation that can happen in your spine. Here is how you can generate speed safely.