Start with Why by Simon Sinek

Sinek really digs into why is it important to figure out our higher cause as designers and business owners. By living into that passion, a side product is that we inspire our design clients and colleagues. This clarity about our passions helps us align our core values with what we do everyday. When we infuse our driving force into everything we do, setting up, marketing, and growing our business comes more easily. Sinek has written a series of books that further explore this concept.