white track line
saw the title of the thread and i apologize ahead of time if someone has said this before in earlier reply. (don't have the time to read them all!)
but learn to use the expanded VOR/ILS picture-(in 3/4/5's and NG's) and move that white track line to where it needs to be.
later sim tests will take away the flight directors at times and you must know how to fly the white track line.
every 737 i have flown needs about 56 +/- with two engines and 70 +/- with one engine once on the glide slope. single engine level flight is about 80 something as well. depends on weight.
numbers available else where on 737 sites and they don't change that much over the different models
and like the other replier said, think of your arm directly connected to your rudder leg when single engine and keep them still once set.
airspeed is our friend!!!!
on the EFIS/NG fly the white bug Vref+15 or a bit more (never slower) when single engine and approaching the glide. you can't fail for having a few extra knots of airspeed and it keeps both ailerons and rudders effective.
get slow and live gets much more difficult. i never aim for the Vref+5 trap!
and don't forget the option of going around early and setting up again.
and sad to say, it does (at times) depend on who the checker was!!