When you hit your approach shots try to get them to land in The Box which is three yards in front and behind the hole, this will make sure that you are always putting from the side of the hole where there is less speed to deal with
Practice what a proper impact position should be lin the mirror and then go to the range and take small swings starting at your impact position
Many slicers set up with their right shoulder too high, prior to bending over to get in to your stance try tilting your right shoulder slightly down then take your stance, this will allow your body to work more around your right side and eliminate that steep downswing