Hey, I am planning to use Web 2.0 sites for link building. I have got a few doubts. 1. Content: What content to use. Is it ok to use content I have posted on article directories or slightly spin it and use? Or do I have to have unique content. And how often do I have to add new content? 2.Link placement: How long to wait before I place the links? Do I put it there initially or wait a month or so? 3.Blasting: Do I go all out on blasting with xrumer and scrapebox? What would be an ideal way to approach link building for these. 4. Platforms: What are the best web2 sites there for use as buffer sites?