According to Australian Corporate Diaries, writing a diary entry entails being very honest about events and feelings. Diary entries should always be dated to make it easy to refer back and place them in context.
Some pre-printed diaries or journals come with dates already on the pages. If not, it is important to start each entry with the date. Content in each entry can vary depending on the diarist's wishes, and can focus on what happened during the day or how the writer felt about it. A journal is a useful tool to jot down ideas for future creative or business projects. It is also possible to use a diary to save memories more tangibly by pasting in ticket stubs, photos or newspaper clippings.