Some heel shots are caused because at set up you are too close to the ball causing your arms to start inside your shoulders
Depending on whether you are a hooker or slicer, making a minor adjustment to your setup and having a plan before you hit the course is key
Tension is by far the biggest killer in the golf swing, gripping too tightly, standing in your set up too long, you need to keep your body in motion and relaxed to properly strike a golf ball