Make a long, lazy, slow-paced swing to create a high trajectory. This gets the ball up high so that it lands softly and does not roll. It is a risky shot, so only play it once you have practiced it sufficiently.
When just off the green you can either putt through the fringe or chip using one of these two chipping techniques, don't just do one, try all three and use the one that you are most comfortable with
Set your body with the slope and have your swing bottom out at or just in front of the ball