Location: Denver, Colorado His business: Jeff is a business lawyer living in Denver, Colorado. In his long entrepreneurial career, Jeff has opened two private practices and ran a newspaper business with over 100 employees. How I met him: He also volunteers at the Denver SBDC, which is where I met him. Although Danielle and I went in for legal advice, Jeff had a lot of other great nuggets of wisdom for us. His insights on a common problem among many of the businesses he has worked with over the years: You have to know when to walk away. He has seen many businesses who struggled on for years after …