Let's summarize the above part of this SEO guide. Here is a quick synopsis of what you have already read: 1. Good inbound link is a link from a relevant, high-PR site closely related to yours. 2. Good inbound link has target keywords in its anchor text and around the link itself. 3. Good inbound link points to a landing page made specially for each target keyword. 4. Reciprocal links and directories still work, but don't expect miracles. 5. Don't overlook social bookmarking sites. 6. Article submission is useless. 7. Do not spam. 8. Paid links may both hurt and help. To avoid penalty, paid links must be nofollow. 9. Keep your link neighbourhood clean and relevant.
A profound keyword research allows you to view the top results on particular keyword and a summary on this keywords may be for off page ranking factors.
Thank you for sharing this nice tips and this "Good inbound link is a link from a relevant, high-PR site closely related to yours" is the most important off-page factors
Article submission for me is NOT useless. Especially if you submit your articles to different article directories with high alexa rank. Also your article will have a chance to be posted to other websites by other people which helps a lot. No. 1 is the best especially if you can place your keyword as anchor text but it is really just hard to find. To add up, having your backlinks in web2.0 sites also helps like squidoo and hubpages. Cheers