Since founding the crowd-sourced errand service TaskRabbit in 2008, Leah Busque has steadily and purposefully built her company from humble Boston beginnings to a national powerhouse. In this talk at the annual 99U Conference followed by a Q&A with Behance’s Scott Belsky, Leah shares five lessons learned from building TaskRabbit from the ground up, including the importance of sharing your ideas liberally, methods used for building a network of supporters and investors, and the importance of setting a B.H.A.G. (Big, Hairy, Audacious Goal).