There are many way to get backlink such as directory submission, forum posting, article submission, social bookmarking, blog commenting, link exchange, link buying, guest blogging etc
The best and good method is bookmarking of your site. There is no wait or approval needed to get the back link.
forums, Wordpress blog comments, create free blogger sites that have articles that link to your main site, you can also buy backlinks in the marketplace, you can also use article directories.
All links will have some value - but the key is to diversify your links - don't just get them all from one place.
In order to get backlinks, submit your site to some directory sites with a higher PR than your site. Then always bookmark your daily post to popular bookmarking sites. Create a page or account to social media sites and try to build good reputation by joining in some community or related niche.
In Off page SEO there are many techniques to get backlink like forum posting, article submission, social bookmaking, PDF submission, video submission, blog commuting and link exchange. But it is most impotent to use of this all techniques in high page rank website so you can get quality backlink.
Do not overdo link building, go slow but steady, avoid mass directory submissions and low quality backlinks; those will do you no good
back links are most important for seo, to get more back link, there is only one way that is a quality link building. for quality link building do following. - Article Submission - Social Bookmarking - Blog Posting and commenting - forum posting - link wheel ....etc
Research programs like: Article Marketing Robot SEO Nuke SEO Link Robot Link Juicer Scrapebox XRumer Even if you cannot afford to buy the program, just reading the sales page will give you an idea of what to do on your own. Just be sure to do some backlinking every day to see results in like 3-6 months.
One way was by checking your competitors back links in yahoo Ex plorer. Now that it is closed I use SEOmoz's Open Site Explorer.
One good method of getting back links to your site is to visitr websites lke the Blogger Link Up and sign up for the news letter that goes out there. Once you're getting that email you'll see bloggers who want guest posts and are willing to let you blog for them. When you write a guest blog you can put a link in the article describing the author.
Also keep in mind that you focus more on quality instead of only quantity... Appy linking.. Cheerss....
Getting back link is not the rocket science but which type of back links you should get that is different case. You can get back link forum , social book marking, Blog Commenting .