One man’s life story can be another person’s lesson plan for life. Gerald “Jerry” Rivinius spent more than 40 years in retail in several states, from the Great Lakes to the Rocky Mountains. In his memoir, “Crazy Days,” he shares those life-long experiences with others who can relate to and benefit from his practical knowledge and accomplishments. Over his long career, Jerry grew from a young pharmacy school graduate into a key manager with one of the largest pharmacy chains in the world. Yet he found ways to balance the demands of the profession with a personal life that includes family, travel and sports.