Invest in Partners for Mutual Profit outlines five proven strategies for sales growth: 1) invest enormous energy in managing performance and ensuring stakeholder alignment with a clear vision, 2) find growth opportunities before competitors through advanced analytics, 3) improve back office operations to free up frontline sales time, 4) build strong marketing and sales collaboration, and 5) focus on developing sales talent. Implementing these strategies can lead to sales growth above market trends, increased win rates, and operating margin improvements over 40%.