Facing a tricky downhill chip shot, put the ball back in your stance and feel like you’re swinging out-to-in to get the ball to start out a little left of the finishing target.
Similarly for opposite-breaking shots, if you’re looking to play a shot that requires some right-to-left release, you want to swing in-to-out to ensure your ball is taking off in the right direction for the shot you’re attempting to play.
Make sure you’re keeping your angles, staying down on the ball and hitting it out of the center of the face. Practice this, and you’ll get up-and-down for par more often.