This is whitehat. I guess so. You know the difference between do follow and no follow. No need to repeat. Many people say it does not matters so much, but the truth is that it matters. A do follow link matters more than a no follow links. So, take a list of do follow blogs http://nicusor.com/do-follow-list/ You can find a directory here: http://www.dofollowblogs.com/ So you know on each blogs you should comments with your url in website field, and you name as an anchor text such that you can get maximum benefits from this blogs. Now comes the second part: use this tool to find the page rank of internal pages: http://www.livepr.info/internal-pages-page-rank.php Sometimes is buggy, but usually works well. Find old blog posts having high page rank, and comment on them. I have found like 3 pagerank 5 pages, and countless pagerank 4 pages when i used it. Afterwards just comment leaving a link on the blog pages that have a high pagerank. Maximum efficiency from blog comments.