Put a tee in the back of the cup and hit it squarely with every putt
A two plane swing manipulates the shaft on plane by rotating the club. The one plane swing is more athletic and naturally places the club on the correct swing and shoulder path, which is better for women and requires less maintenance.
Many slicers hit the ball to the right simply because they are lined up to the right, when they go to hit the ball their mind knows the target is to the left and then subconsciously changes the swing to outside in so that the club travels towards the target causing a slice