Sarah Milstein is an executive coach working with established and emerging leaders in tech. She previously held executive roles at Daily, ConvertKit, Mailchimp, 18F.gov, and indie.vc. She was also CEO and co-founder of Lean Startup Productions and co-author of The Twitter Book. Earlier, she was a freelance journalist writing regularly for The New York Times. She holds an MBA from UC Berkeley. Bonus fact: She was the 21st user of the original Twitter.