In this snippet from "You Are Not Your Brain: The 4-Step Solution for Changing Bad Habits, Ending Unhealthy Thinking, and Taking Control of Your Life" by Jeffrey Schwartz
Schwartz states that refocusing attention can actually change brain structure so that habitual ways of the brain are physically broken and other new healthy behaviors become habitual with new connections in the brain.
Are their any other studies along these lines that mention how to change how one thinks and feels habitually?