Firstly, dump some speed. I used to fly a 172 fully loaded (with smelly bush walkers) and used an approach speed in the order of 55 Kts or so, 60 if windy. It was more than enough. The time to round out is when be runway surface starts to loose the blur and becomes visually clear. Ease the power back and as you round out, look well down the runway. Apply gentle back pressure and using your peripheral vision prevent the aircraft from climbing, just allow it to gently sink. It will not land until it is ready. Do not make it land.
PM