It was mentioned earlier in the thread and then not mentioned again so i'll put my 5 pence worth in on TRIM.
I fly an ageing PA280-140 with a long approach speed of 85 mph (inconsistent units in aviation really wind me up - but the ASI is in mph). It is the short wing version of the PA28 and is very reactive to flap in both attitude and drag.
If you get well trimmed on base so she'll fly hands-off at 85mph with 2 stages of flap it takes only minor yoke and power inputs to follow a perfect glidepath. Even slightly out of trim and it is a struggle right down to the threshold, even more so when there is gusting.
I was lucky with my instructor who explained trimming very comprehensively and after every power change would shout TRIM - it is now second nature to trim to zero input pressure for the power & attitude. It makes flying so much easier because you are flying the plane and not fighting it.