Hey guys, I've been doing some research and I see posts from people like Matthew Woodward and Jacob King that are great. And they usually show their Tier 1 diagrams with 3 different links such as a Web 2.0, Wiki, Social Bookmark, Article submission and so on. Jacob King had an article saying not to use Social Bookmarks though, i found it a little confusing as to why so I'll have to revisit the article. Do you agree with him? What are your favourite types of links for tier 1? And do you spam Tier 2 or do a clean Tier 2 and spam Tier 3? I notice a lot of guys ranking low competition sites using just 1 web 2.0 as Tier 1 and it looks like they are spamming a lot on their Tier 2.