When you hit a weak, high slice, you need: A flatter backswing.
Why you need it:
If your hands rise too steeply during the backswing, your shoulders tilt when they should be turning. When you don't make a full turn, you rush the downswing and lose power and consistency.

How to get it:
Imagine that you're in a room with a low ceiling--about one foot above your head. The goal is to feel like you can make a full backswing and follow-through without banging the clubhead into the the ceiling. By picturing the club staying under the ceiling from start to finish, you'll make a better turn behind and release the club to eliminate that slice.