Case study of three Thai entrepreneurs (PRAMY, Dr.PONG, ยืดเปล่า) who built billion-baht brands before age 35. Key lessons: start with real market action rather than lengthy business plans; identify timing and first-mover advantage in emerging channels (TikTok, online); build direct customer relationships; focus on product-market fit through customer feedback. Their approach—launching without perfect strategies, pivoting on market signals, and capturing trends early—offers actionable insights for SMEs across generations.