Step 1: Calibrate your airspeed indicator. Many are way off. See the procedure at the bottom of this article:
http://edburkhead.com/Ercoupe/airspeed_indicator_errors.htm Up at altitude, determine YOUR PLANE'S minimum flying speed (stall burble). Now, consider that to land as slow as possible, I recommend flying down final at 1.3 to 1.4 times that minimum flying speed. Start at 1.4 times minimum and creep down to 1.3 times if it feels all right for you. Fly the approach at 1.3 - 1.4 times minimum flying speed then level off in the flare at a foot above the runway. Hold it there till you can't hold it off any more. Keep the nose up as the plane does its rotation to line up with its direction of motion but hold the yoke lightly (just a couple of fingers) so the nose wheel can turn freely when it touches the ground. Ed
