[John Scott]

1. PageRank zero pages can pass link juice and impact rankings.

2. High PageRank pages do not necessarily pass link juice. Many link to bad neighborhoods and have lost link juice passing ability.

3. ALT text of images linked to other can be very powerful.

4. Link placement matters - footer links often do not help.

5. Link stability matters. Links in rotation do not have the same properties as static links.

6. For Google, exact match anchor texts help. That is to say, if you want to rank for "web hosting" then get links with "web hosting" in the anchor text and not variations thereof.

7. Non keyword anchor text links help.