There has been a great tradition of keeping diaries and journals for many centuries. Though they may seem at first glance, mundane, unimportant and even self indulgent they are extremely valuable historical documents. Compared to other source material, diaries are often unambiguous and can indirectly reference a wealth of important detail, providing a useful overview of the world at the time of writing. They reflect the perspective of ordinary people and everyday life, unencumbered by wider considerations faced by historians. For example, consider the diaries of Samuel Pepys or Anne Frank. There are also a lot of personal benefits to keeping a diary. They can help improve self-awareness, your memory and metacognition. They also provide stress management, reduce procrastination and have a positive effect upon one’s mental wellbeing.