SEO - top considerations for landing pages

From SEOmoz.org, the following components are ranked below with scores out of 5.

On-page optimization ranking factor importance:

• title attribute of document = 4.9/5
• Meta name description = 2/5
• Meta name keywords = 1/5
• Keyword frequency and density = 3.7/5
• Keyword in headings - h1 = 3.1, h2 = 2.8
• Keyword in document name = 2.8

Off-page optimisation ranking factor importance:

• More backlinks (higher PageRank) = 4/5
• Page assessed as a hub = 3.5/5
• Page assessed as an authority = 3.5/5
• Link anchor text contains keyword = 4.4/5
• Link velocity (rate at which changes) = 3.5/5