Which one the most effective activity

[henryestvir]

go at it, hard core, figure out how to be an expert at guest blogging, thats key

[mnichs23]

Yes,

You must have to complete on page for your website and then start off page activities for the same and it will work for sure....

[seosolutions84]

There are various techniques in SEO and only a one cannot be called superior,because all of these were important and works very well.

[eurekapsycrille]

blog commenting, forum posting and social bookmarking are the best ways to improve your site performance. go ahead with it.

Totally wrong. Blog commenting has already lost it's full effectiveness since 2007. Forum posting is one of the most spammed methods among all link building activities. Social bookmarking is already effective since the day it was included as part of link building and promotions.

How can you prove to us that those techniques are the most effective? Let me just remind you that search engines are not that "link oriented" to the extent that they consider links as the most vital part of SEO.