Writing a diary is a good way to record your thoughts, feelings, and experiences to help you think better and reflect on your growth. Here are some tips on what to write in a diary and how to better grow yourself through it: 1. What to write: You can write anything you are interested in or important in a diary, including personal experiences, thoughts, feelings, plans, goals, and so on. He could start from the small things in his daily life and gradually increase the space to challenge himself to record more things. 2. Record important events: Recording important events was an important part of keeping a diary. These events could be his own successes, challenges, lost moments, important decisions, and so on. By recording these events, he could better understand his own growth process and better recall the past. 3. Thinking and Reflection: Writing a diary could also help him think and reflect. He could write down his own views on a problem, his own thoughts and ideas, as well as his own reflection and evaluation. This would help him better understand his own way of thinking and personality. 4. Record Growth: Writing a diary could also record one's growth. You can write down what you have learned, new experiences and skills, as well as your goals and plans. This would help him better understand his own growth process and better apply it in his future life. To grow better through writing a diary, you need to keep a record of your thoughts and feelings and constantly challenge yourself to record more things. At the same time, he also needed to constantly review his diary to understand his growth process and gains. The most important thing was to believe in yourself and believe that your record could help you grow.