I've been lucky to be working with people in Sidebar for a bit now and it's been amazingly helpful. Having a set of people who have similar goals and challenges, to talk with, that you trust, and can get help from makes a huge difference. As people get better at their craft and more senior in their careers, it becomes harder and harder to have a great, independent set of people to learn from and bounce ideas off of, Sidebar delivers on this. And the caliber of people is impressive and energizing.
