Making practice swings instead of hitting balls is a better way to improve your swing technique. If you are trying to learn the swing or make a swing change, rehearsing the move without hitting a ball will assure that you are actually doing the correct move. Repeating the motion that you want to achieve will help ingrain the move into your real swing.

9:37-min CardioGolf™ Slope Swing Fundamentals
Grip
Check Clubface
Set-Up
Alignment
Distance to the Ball
Club Path
Up Slope