Onpage SEO
 

How important is keyword density? I have tried to achieve it between 2-4% on most of my pages.

On-page optimization is the process that has the factors effect on your Web site or Web page that have listing is natural search result, this factors are controlled by doing coding in HTML, the On-page optimization examples are meta tags, keyword placement and keyword density.

website architecture changes to seo friendly with unique content,meta, img tags is on page and submission of url in various high pr sites is off page.

Meta tag optimization.
Keyword Analysis
Competitor Analysis
Key Word Density
Sitemap xml & Robot.txt
H1 to H6 Tag
Title Tag optimization.