I had to learn this for my Advanced Test and having a serving Traffic cop sat beside you does focus the mind!
It takes a bit of getting used to but eventually it becomes normal though I admit I've lapsed a bit (laziness) and only do an occasional run with the full blown push-pull and commentary every now and again.
Stick with it - it certainly made my driving much smoother and I reckon I do get places quicker and defo more relaxed.