Score Level for Search Engine Optimization

1. Link Popularity=2.0
2. The main Body text=2.0
3. Domain name=1.5
4. Keyword Prominence=1.0
5. Heading Tags=1.0
6. Proximity Of Keyword=0.5
7. Bold or Italic=0.5
8. Folder or File name=0.4
9. Meta Description=0.3
10. Alt Tag=0.2
11. Title Attribute==0.1
12. Meta Keyword=0.1  

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http://www.seomoz.org/blog