When I am just off the runway (a foot or less) I completely cut the throttle and let it touch down.
For a good landing do not let your plane touch down! A good landing is made by trying to prevent it from touching down with a long deliberate flair. That is you start pulling the stick back and get the nose up, you keep pulling the stick back with the plane just over the runway. When you can no longer keep the plane off it will settle in for a smooth landing without bouncing. When this is learned you can then modifiy this forshort runway, wheel landings on a taildragger, etc. but first you must learn the basic flair.
BTW don't try this with a sailplane unless you have plenty of runway! It may result in floating all the way intot the trees, fence, or whatever.