Journaling helps keep your brain in tip-top shape. Not only does it boost memory and comprehension, it also increases working memory capacity, which may reflect improved cognitive processing. Boosts Mood. There are many benefits to journaling, but the main one is that it can help you to process and reflect on your thoughts and experiences. By writing down your thoughts and feelings, you can learn more about yourself and how you are behaving. Additionally, journaling can be a way to connect with others. If you share your journal with someone, they can help you to process and reflect on your thoughts and experiences. Finally, journaling can be a way to improve your creativity and writing skills.