757 Asymmetric flying. Probably true for other types but I don't know anything about those.
Rule 1. Don't get slow.
Rule 2. Rule 1 applies at all times.
Seat position so that you can get full rudder with a slightly bent leg.
Use the rudder to keep the yoke centralised/horizontal.
TRIM.
When changing power, live power goes forward, live rudder goes forward and trim, likewise reducing power.
As speed increases rudder becomes more effective and vice versa.
For transient changes eg small climb/descent/speed you can hold the rudder force until the manoeuvre is complete and then hold the force, sense the force, trim the force. Or you can trim through the manoeuvre.
The trim takes a while to travel - longer than you think. Try it on the ground.
As above take every opportunity for extra sim practice. Something I've found helpful with some is start at +80, accel to 250, slow to F5,+40 to practice coordinating power vs trim.
Just a few thoughts, HtH
rgds