Hello friends, Let me know,Is making comments on do - follow blogs is really a good step to boost up your ranking and getting links (in case of Google). I was collecting do follow blogs.I checked the lists posted here in DP ,DO follow Search engines and use Comment software to get a list of do follow blogs.The major problem i am facing that several do follow blogs are now get converted into no follow blogs. I have seen many comments on those blogs. As the blogs are no more do follow,Is It means that the comments made by the people on them now become worthless ? Is commenting on blogs not a permanent way for getting back links ? Say i want to promote website (which is not a blog) ,offering some kinda service then What are other effective ways to get permanent back links and to increase SERP ? Share some tips please ....