It seems like tension in shoulders, arms, hands, fingers, etc., are natural reactions that must be retrained in a variety of situations. So, to avoid the tension, we need to examine exactly where and why it occurs (which passage, which technical situation), and then practice doing the exact opposite of what feels natural - if it feels natural for some reason to raise and tense the shoulders, practice lowering and relaxing them at just the point where we feel most like raising and tensing them.