Glide path control on final.
I get into discussions with instructors and others and usually find myself to be outside normal thinking, but this one I can't let go of. I see students screw up landings because they cannot fly a final approach. They do not know how to get onto a correct glidepath and canot maintain one even if they recognise it. The particular bane is the student (and some of these guys/girls are commercial pilots) who lets the nose come up approaching the runway and loses speed, then has to dive for the runway or drops on in a partial stall.
The traditional advice is to use attitude for speed and thrust or power for glidepath. But that does not work on an ILS, except in a very rough and ready manner, since the response is too slow, so I have always flown the glidepath with attitude (elevators) and maintain the speed with small changes in thrust.
Most variations from the normal glidepath are pilot induced, so that if the airplane goes a little low, the speed will be a little high as a result. Getting back on the glidepath using elevators will simultaneously correct glidepath and speed.
Of the two parameters, speed and glidepath, glidepath is the more important. The airplane can safely land if a little fast or slow, but it cannot safely land if the landing is short or long.
Many pilots don't seem to give a damn about where on the runway they land, so long as there is tarmac under them, but I like to teach my students that there will not always be excess runway available and they should make every landing as a precision landing.
And a glider does not have power to adjust the glidepath (sure it has speed brake but I am sure most glider pilots do not pedal their way down final with that control).
I therefore teach that when on final, the pilot should establish the glidepath and speed, and maintain the glide path using elevator, adjusting power as needed to control airspeed. For every airplane, not just the B737.
Some of the junior instructors I have spoken to about this claim I am talking heresy, but cannot give me a sporting argument.
I am not talking about normal descents or climbs, just on final. If turning base you see you are high, of course drag back the throttle or select flap early, and if low, push the throttle forward. I am only speaking about a glide path, whether electronic or visual.