读书、运动、早睡，是性价比最高的投资

Core Viewpoint - The article emphasizes that the most worthwhile investments in life do not require significant costs but can yield long-term returns through consistent practices such as reading, exercising, and going to bed early [4][32]. Summary by Sections Reading - Reading is highlighted as a low-cost method for self-improvement, allowing individuals to engage with the wisdom of past and present thinkers without geographical or temporal constraints [5][9]. - The article cites Liang Qichao, who dedicated two hours daily to reading despite his busy political life, illustrating the importance of continuous knowledge accumulation [6][7]. - The benefits of reading include enhanced cognitive abilities, clearer decision-making, and a resilient mindset during challenging times [9]. Exercise - Regular physical activity is presented as the most reliable form of health insurance, with the idea that lack of movement can lead to illness [11][12]. - The article references Zeng Guofan, who recognized the importance of exercise after suffering from health issues, and incorporated it into his daily routine [13][15]. - Exercise is framed as a crucial investment in health, providing long-term benefits that outweigh the time spent [19]. Sleep - Early sleep is described as an effective way to recharge energy, improve focus, and enhance overall well-being [21][23]. - The article mentions Su Shi, who maintained a regular sleep schedule even during difficult times, emphasizing the value of adequate rest for mental and physical recovery [24][26]. - Establishing a habit of early sleep is portrayed as a natural part of life that leads to increased vitality and enjoyment of life [30][32].