Be stabilized in your descent well before the fence. I've seen many students taught to add the final notch of flaps as you cross the fence and "have the runway made". Humbug! That means your fighting to get stabilized during the busiest part of the landing. Be in your landing configuration well before that and adjust your altitude to have the runway made well before you cross the fence.
Joe
Now, Joe, I don't recall you saying "Humbug!" when I said that's what I had been taught.
If I recall correctly, it was more of a "Hmmmm..." and a raised eyebrow.
Joe is right on this one. My CFI still does it this way himself and teaches it this way, too. It works for him just fine but it is a little harder. His feeling is that it's a little safer and worth the extra effort. When learning to land, it was a distraction for me.
Decide ahead of time what flaps you're going to use and add any remaining flaps once you turn to final. So, if you're using 40 and you've got 20 down on base, make your turn to final and add the remaining 20. This will let you concentrate on stabilizing your approach and getting it right.
Joe will attest that I had a hard time getting the last few seconds of the landing down. I think his quote was "we've got drift across the runway and the position of the nose and pitch attitude and you're getting any two of those right on any landing".
Stabilizing the approach and then not making any further changes in configuration helped a lot.
Also, I don't think trim was mentioned above. I was originally taught to add a "handful" of trim when starting my landing abeam the intended landing point. The process would be power back to 1500, 10 degrees of flaps and a handful of trim. That actually does work pretty well, but I find that my landings are better and easier if I retrim for my approach speed after adding any remaining flaps on final. Nailing the approach speed will make things a lot easier.
Decide what speed you want to approach at and try to fly each approach at the same speed. Don't fixate on the airspeed indicator but do glance at it often. If you've got the trim right, it should be pretty easy to keep the airspeed right where you want it. Every landing seems to be different but controlling airspeed lets you keep at least one variable the same.