Main thing don't be discouraged. I have over 500 hours in a 172 and my landings are not always perfect and I am still trying to learn the best technique for this aircraft. Seems to change on a daily basis. I also believe and was told by many instructors during my training that your landing starts with your traffic pattern and approach. If you are fast in yor traffic pattern you will end up fast on final and in your flare and you will float or baloon if you pull the yoke back to much. So fly the pattern specefied by your instructor and fly a stabalized approach and those last few seconds will be much easier. Oh and EYES TO THE END OF THE RUNWAY!! At least thats what some of my instructors use to yell. Good luck and remember all students will hit a learning plateau so don't be discouraged and keep up the good work.