When your hips work together, your swing becomes easier to pull off. Get a feel for how your hips work for eachother in your swing.
Training your body for the right instincts is very important. Learn how the step back drill keeps your body in check.
Seeing lines when you putt is very important. Learn how to set up lines so that you can improve your putting stroke.
When you putt, there is very little face rotation. Learn how to train yourself to stay away from rotating the club face.