On approach, bring back the throttle to start your descent. Use elevator to control attitude, throttle to control altitude. In other words, keep the plane level using elevator, and control your sink rate by nudging or backing off the throttle, just a click at a time. If you go long, throttle up and go around, try again. The ideal is to reach a stall about the time the mains touch, then pull throttle to idle. Some planes land better with a little speed, usually planes with a higher wing loading.