Book Freak is a weekly newsletter with cognitive tools you can use to improve the quality of your life.Surgeon Don Miguel Ruiz had a near-death experience that caused him to rethink the way he had been living. He developed a set of four agreements with himself to help him life a more fulfilling life: Be impeccable with your word.Don’t take anything personally.Don’t make assumptions.Always do your best.Here's advice from his book, The Four Agreements: A Practical Guide to Personal Freedom.