Trimming out yaw ..

So I got the pitch trim down mostly, but yaw seems to have me struggling.I realize;the rudder trim provides yaw, and roll adjustment.the ailerons provide roll adjustment.So the rudder and ailerons can interact.Question is, when trimming out torque in flight, do you adjust the rudder or aileron first? How far and then what? Rudder till yaw is gone, and then aileron, or aileron until roll is gone and then rudder?Basically I'm trying to keep from over trimming the airplane (excess rudder countered by excess opposit aileron).Ideas?