Well all are important in SEO to get the back links of your site if you skip one of them then it will be harm to your site for getting into the top in various search engines as well as page rank also.

So, forget about the best from one of them instead focus in all.

It depends upon your work strategy
-Social Bookmarking and Web 2.o give quick and help you improving your ranking
-Forum and Blog commenting help drive huge traffic to you site
This back links method best among other.

Social Bookmarking, Directory submission, Forum posting, Article submission.

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what is the best backlinks building method?

social bookmarking service
directory submission
forum posting
profile backlinks
article submission
blog comments
web2.0 backlinks
yahoo answers

what do you think is the best way to create backlinks?

You need to use all of that. but focus more on social bookmarking as it gives larger weight in google spiders. I am not sure though but that is based on my experience. i got lots of traffics from it.

All these methods are beneficial for getting backlinks. You can also do press release, classified submission and ree feed submission. These methods also helps in getting backlinks to the site.

According to me above mentioned all methods are good to build quality back links to your website.I suggest you to do all submission,because only one method is not sufficient to get more back-links to your website, that too in this competitive world.

what is the best backlinks building method?

social bookmarking service
directory submission
forum posting
profile backlinks
article submission
blog comments
web2.0 backlinks
yahoo answers

what do you think is the best way to create backlinks?

Getting One way contextual back link through content sharing is the best way to create back links.

Well all of these are important because they all have own ability like Social Bookmarking is used for indexing, Article Submission is used for Back Link, Ping Services is used for visibility of your site in different search engines, Forum Posting and blog commenting is used for getting the traffic etc. So all are these activities are very important in SEO. But still if you want to pick up one of them then my vote goes to social bookmarking.

social bookmarking service
directory submission
are the best method

Forum posting and directory submission is the best backlink technique.....

social bookmarking service
directory submission
forum posting
profile backlinks
article submission
blog comments
web2.0 backlinks
yahoo answers

Forum posting and Blog commenting are much better way to increase backlinks because you can get quality backlinks from them and also you can drive relevant traffic to your site from other sites.

A quality work is always brings the positive results.

Back links are the back bone of seo , back links plays a vital role in improving ranking and gaining more traffic so make all available source for back linking like article submission , blog commenting , directory submission etc

what is the best backlinks building method?

social bookmarking service
directory submission
forum posting
profile backlinks
article submission
blog comments
web2.0 backlinks
yahoo answers

what do you think is the best way to create backlinks?

Link exchange with thematic websites would be the best link building methods.

Bookmarking is one of the best back links.The next comes blog submission, forum posting to give out the better back link

Now you can rely only these three for best and most effective link building techniques
article submission
blog comments
web2.0 backlinks

@Ramakarthichk123
"Bookmarking is one of the best back links.The next comes blog submission, forum posting to give out the better back link"

What do you say about the fact that social sites, blogs and most forums have no follow on links? How do you make backlinks in this case

we have differnt methods for link building dir submission , article submission , forum posting , blog commenting all the traditional methods , but i want to add up one which is more useful now a days and that is link Wheeling method Google is giving importance to link wheeling

All the traditional methods which are being used for link building is good best i personally prefer link wheeling method for link buidlidng.I have experenced this method gives rapid benefits for driving a traffic and also increase bac links,

We will be highly recommending Web 2.0 back links is the best method to gain back links.