Beginning a climb or descent from level. I know that the thrust change is gonna try to do the opposite thing with the nose relative to what I intend, so (in beginning a climb) a long-ish blip of nose-up trim as I increase thrust kills the nose-down tendency before it even starts, starts the nose going up smoothly, and then I manage slight deviations with the elevator until it settles into the new attitude, whereupon I do some final clean-up trimming.
Does increasing power in an aircraft with fuselage mounted engines cause a pitch down moment?