Minimum SOP’s for web authors/bloggers should include:
- Validate your pages. Use the markup validation as well as the CSS validation services, both offered by W3C.
- Run the link checker against your site’s pages. Find and fix any broken links.
- If you are providing syndicated feeds, validate it/them.
The W3C tips are recommended reading for all web authors. [Re-]read one of these every day and apply what you learn! Your visitors will thank you.