Best method to get back links is Social Media optimization(SMO) and to write articles, I mean Nice Article and open them for the submission by other with your link in there websites.... More methods are HERE...
For getting back links do link building, forum posting,blog commenting and also do some social bookmarking.
Blog commenting is the best option to increases your backlinks. also free directories submissions, forum posting and social bookmarking help you to gain your backlinks.
ya , directories submission , blog commenting , forums posting, social book marking, articles submission are the easiest way for building link.
offer free content to blogs, write articles and submit them to article directories. Forum posting and blog commenting also good but I don't rely on them that much if you want PR. However, they are really good for traffic.
Low budget promoters use forum post signatures, blog post comments, social bookmarks (like digg) and links in original article author credits. Top ranked sites may buy sitewide blogroll links from ranked sites, use paid press release services like prweb, or apply to Yahoo Directory for $299/yr.
Most of these methods (forum posting,blog commenting and also do some social bookmarking) will get you low quality links. That is fine if your link profile has good links, but to only have low quality links will not get anywhere. For higher quality links, consider few paid directories, link bait, and guest posts.
The DP forum has been very helpfull again. So which one of the above ways to build backlinks will you pick?
There are many ways to build backlinks. If what you are looking for is SEO techniques then you may want to pay close attention to the recommendations given to you in the Link Building Techniques SultanofSEO gave you. Many people will proclaim themselves to be SEO experts but few are. And that list of techniques is pretty comprehensive. I am not an SEO expert, and far from being one. But I do know that one of the most important parts of SEO is article writing and submission because I live off of it. Make sure that your articles are of superior quality. There should be a balance between keywords and content. The keywords should be used in well structured sentences which convey a message. And most importantly your article should be informative.