The document provides tips for writing a diary entry, including using first person pronouns like "I", writing in past tense, describing feelings, including details to make it seem like the reader was there, and putting events in order while using time-linking words. It gives examples of diary entries that do or don't follow certain rules, like using past tense correctly or including where an event took place. The final section recaps the main points in a checklist for writing a diary entry.