This document provides five tips for customer retention for entrepreneurs: 1) focus on retaining existing customers rather than acquiring new ones since retaining customers is easier and more profitable; 2) customer retention has a major impact on company profits so it should not be underestimated; 3) implement an effective customer retention program to identify and promote loyal customers; 4) understand actual customer behaviors and needs rather than assumptions to improve retention; 5) engage customers through social media, personalized communications, and relevant promotions to encourage repeat business.