The document outlines 14 lessons the author has learned about sales. Some of the key lessons include maintaining frequent contact with customers through methods like LinkedIn, email and phone calls to generate more sales. The author stresses the importance of listening to customers to understand their needs and pain points. Other lessons recommend selling internally to gain support within an organization, building rapport with customers over multiple meetings, and knowing your competition and products well. The overall message is that consistent follow up and contact are important for sales success.