12. Linking
The best way to increase your ranking with Google, is by having other highly-rated sites linking to your site. Try to keep to related subject sites, and avoid the "link" farms. Some engines will ignore pages that only contain links. Or have too many links. Find who is linking to your site by using one of these free sites:
TrafficRanking
Link Popularity
Jim Tools
Find sites to exchange links with you:
Links To You
EProfitNews
LinkPartners