Originals, he preached the value of new ideas. In his new book, Think Again, Grant wants readers to forget, let go and move on from ideas and knowledge that isn’t working for them. “If you can master the art of rethinking, I believe you’ll be better positioned for success at work and happiness in life,” Grant writes. “Thinking again can help you generate new solutions to old problems and revisit old solutions to new problems. It’s a path to… living with fewer regrets.” Sometimes no matter how well-thought out or carefully laid out plans can be, they can give us tunnel vision, Grant writes. When we become open to new ideas, we begin to see faults in those plans, and can identify and prevent mistakes we were likely to make. (February; Viking; $28)