I know this probably isn't what you want to hear but lots of practice.I ask my students to fly past the field then cut throttle to 1/4 speed,then make a 90 degree turn,fly straight till close in line with runway then make another 90 degree turn for approach to runway,keep the plane dropping by slowing engine,just before wheels touch,start adding up ele for flair,if plane bounces then speed was to fast. Landing is the hardest part of flying.