Investing works best when investors adopt a long-term mindset. Thinking in terms of decades instead of days or months allows one to focus on the factors that matter the most. And it allows for the power of compound growth to work its magic.Looking back, there have been some massive winners that favored patient investors. For example, one dominant industry-leading enterprise has generated a total return of 6,540% for shareholders over the past 30 years (as of July 15). That monster gain means that if someone ...