The document outlines 7 new rules for writing an effective cover letter that focuses on demonstrating value to the hiring company rather than personal accomplishments. The rules are: 1) Keep the letter short enough to read in 10 seconds, 2) Hook the reader in the first sentence, 3) Highlight 2-3 skills from the job description, 4) Back up claims with numbers, 5) Don't rehash the resume, 6) Address the letter to the specific hiring manager, and 7) Proofread carefully.