On difficult greens create a red light, yellow light and green light section and play your shot according to the risk involved
Aiming incorrectly will force you to manipulate your golf swing to hit the ball in the same direction, fixing this is simple, just practice with a club on the ground parallel to the target line so that you learn the correct feel and look of the proper alignment
Hitting the ball with the sweet spot of the putter allows the putter face to stay square and not twist