Selling for a living is challenging due to highs and lows, constant pressure to reach sales targets, and demanding customers and prospects. Some ways to succeed include prospecting daily, improving skills continuously, listening more than talking, establishing clear call objectives beyond just closing the sale, creating yearly, quarterly, monthly, and weekly plans, studying products in depth, networking in relevant events, asking insightful questions, delivering customer-focused presentations, adapting approaches to personality styles, setting challenging goals, being persistent, forging relationships, and showing respect to all people.