Here are some good basic guidelines for agent query letters (mostly as they apply to books) from a column on writersdigest.com. Click here to read the full article.

When Writing a Query Letter Do…

  1. Address the agent by name
  2. Cut right to the chase
  3. Sell your manuscript
  4. Explain why you’ve chosen to query this specific agent
  5. Mention your platform (if you have one)
  6. Study other successful query letters

When Writing a Query Letter Don’t…

  1. Be arrogant
  2. Include your age
  3. Tell agents that you value their time
  4. Include writing credits that aren’t meaningful