What aircraft are you flying and maybe me or someone with probably vast experience on type compared to me, can give you some pointers. But...one good tip I was told was to spend a bit of time sitting in the cockpit, getting a feel for a)how high you are off the ground and b) the attitude (ie. how does the nose look against the ground/ horizon). This is how it should look when you touch down. Also, when you get on short final, well nearly over the threshold really, ALWAYS look down the end of the runway. If you look into the distance this will help. Don't look at the numbers or the runway, or the grass! Other than that, without knowing which aircraft you are flying, practice, practice, practice!! Also remember a good landing starts with a good approach. If you spend your base leg turn, base leg and turn onto finals trying to get your RPM within 25 of what it should be, or trying to fly by exact altitudes, you WILL cock it up. I flew with someone once, who had the same problems as you. He was convinced he was looking at the runway throughout the base and final turn. So on his next circuit as he turned base and reduced power I covered all his instruments, other than ASI with a map. He couldn't believe it and after the initial shock, flew about 200 times better than before. Go on then all you official instructors, shout me down!!!