This document provides guidance on writing informal emails and letters. It recommends using openings like "Hi" or the recipient's name to start, and suggests using exclamation points sparingly to show strong feelings. Contractions are normally used in emails to friends, but not in formal emails. When starting an email with "Hi" followed by a name, a comma comes after the name, not "Hi". Paragraphs require a single space, not a double space. The document also provides examples of common phrases for different parts of emails, such as starting, providing good or bad news, moving the topic, making requests, and ending the email.