I have always maintained that discerning your purpose and finding meaning in your life are crucial to understand your own true north. Once you know your true north, all decisions, all challenges, all setbacks become easier to overcome. A fulfilling life is more than simply finding a state of happiness — meaning helps you achieve lasting happiness.
If you only read one personal improvement book, I believe “Seven Habits of Highly Effective People” should be considered. Stephen Covey did a masterful job in help people figure out their own guiding principles and find meaning.
Watch the following video by author Emily Esfahani Smith. It is great food for thought. I especially found her points about storytelling to oneself enlightening — I can see how a person dedicated to optimism will build an internal story about themselves that will help them adapt and overcome:
Purpose is what gives life meaning,