It also helps you learn to break down complex experiences into relevant, useful bits of information organized coherently. Even if you don't think anything special has happened to you, the very act of keeping a journal can help you brainstorm.
Which Medium You Should Choose, and Why, once you've decided to keep a journal, your next decision is the medium to use for it. You have plenty of options, and what works for one person won't work for another. Some of the most influential people in history kept detailed journals of their lives. Those journals served two purposes: a permanent record for posterity, and cathartic release for the people writing them.
The key, however, was to focus on what you were thinking and feeling as opposed to your emotions alone. In short, you get the best benefits of journaling when you're telling your personal story, not just writing about your feelings on their own. Nadel eased the anxiety of finding herself in volatile surroundings by writing - not just for publication, but also for herself. "I thought that if I could write everything down, I could stay safe she says now.