Maintain a constant posture throughout the entire swing so that your body does not move towards the ball during the swing and cause the heel of the club to make contact with the ball
With a Spiky Ball under your armpit stretch your neck to the opposite shoulder, loosening the neck while firing the shoulder muscles
Although an unconventional swing, emulating Lee Trevino's swing by focusing on his right side and the way he came down and straight through the shot, tracking the target line, is a great idea