## HTML Authoring Conventions

- HTML should present itself without the stylesheet
- Check for unclosed tags
- Check for Doctype declaration
- Do not use inline-styles
- Document should have title and meta tags
- Do not use headings for font size
- Use line breaks to separate text, not sections
- Always put proper alt tags to images
- Specify image width and height
- If it's not going to be displayed, it should not be in the markup
- Don't use the `<center>` tag to align text
- Use lowercase letters for tag name
- Make sure IDs are only used once
- Validate