Bill Kroen is a licensed psychotherapist and an instructor on the Callaway professional staff. In addition to his Golf Tip-a-Day Calendar, he also wrote Helping Children Cope with the Loss of a Loved One: A Source for Grown-ups, which won a Parents' Choice Award. He has published more than 250 articles in major journals in the areas of parenting, child psychology, education, and golf. He turned professional in 1986 and has taught golf at facilities throughout the U.S. He lives in Belmont, Mass.