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If you just want to know the best method I think it is blog posting and blog commenting.
However there are a few other good techniques as well like.
Forum posting.
Article marketing.
Social...

You can try to place your website link on your facebook fans page.This will get facebook fans page visitors to click on the link and redirect to your website.

I would like to add some of the most important techniques like
Article submission
Blog submission
Blog commenting
Blog posts
Social bookmarking
Forum posting
Directory submission.

Google out some good SEO e-books and study them.Participate in forum posting it helps you study about several different situations and questions.
Then apply your knowledge practically on some SEO...

Facebook needs to be used intelligently.If you want to increase your CTR you need to make sure that your content is very much relevant.
Secondly try sticking to your keywords.

If you have an attractive and interesting fb page it helps you to get more fans on that.Along with that you need to make sure that your page should be informative and updated.
Once you have worked...