Know what is and isn't appropriate.

Use short, clear sentences and simple punctuation.

Write concisely.

Avoid clumsy phrases, complex vocabulary, and stiff language.

Format for readability.

Proofread your e-mails.

Write a clear, meaningful subject line.

Write an informative beginning.

Focus: write enough but not too much.

Use headings, generalizations, and paragraphs.

Write a cordial, informative conclusion.

Follow up.