IT Authorities, a managed services provider, has achieved 377% growth over three years by focusing exclusively on managed services and documenting its processes. Co-CEO Jason Caras emphasizes the importance of specialization and maintaining core competencies, arguing that trying to be a 'jack of all trades' led to failure in their previous business. By implementing structured workflows and using business automation tools like Autotask, IT Authorities has effectively scaled its operations and improved customer service.