Show me an established category, and I’ll show you a startup that’s disrupting it (or about to). The trusted rules of the road for managing and marketing brands simply don’t cut it on the fast and furious freeways of the startup world where change is everywhere. Established categories and brands have been upended overnight. In fact, big brands and agencies have been on the losing side of disruption as young, nimble companies have transformed entire industries. To navigate change and grow, brands will have to start thinking more like beginners instead of experts.