If your website contains good information then your website will get automatic backlinks from the other webmasters. You can also purchase quality links. Buying links are against the google webmaster guidelines. But many people buy and sell the text links.
You need to search some quality theme relevant sites and do link exchange with them. Article syndication is also the best way to get quality back links.
you have to submit your website link in High PR website. and also consider that website google cache, their backlink, where you put your link.
Daily Posting in forums like for digitalpoint, sitepoint, seochat this type of popular forums Post Your comments in high PR dofollow blog link exchange your business related.
Writing articles that are of good enough quality that sites other than article directories would choose to publish them. And signatures in quality forums. And if you can get webmasters to recommend your site, because what you offer is strongly appreciated. If your site is good and people link to you without your asking, you can get these high quality links without spending any of your time, effort of resources to get them.
You should try guest post in high pr blogs .Also article submission can help a lot . You can buy pr links too . And some webmasters may decide to link with you if they like your content.
Try the basic ones. Look around the forum. Blog commenting ( check my sig) Forum Signatures Article Submission Social Bookmarking Buying Links Link Baiting
Consider these ideas for building linkbait: Free Tools and Applications Top 10 Lists How-To Guides Industry-Related Humor Interviews with Well-Known Insiders Surveys or Collections of Data Videos or Animation Charts, Graphs or Spreadsheets Contests & Giveaways Advice from Experts Games
submit your website link in HIGH PR and and if you do link exchange with your business related website then that will very helpful to get strong backlinks.
Good onpage info Join social networking sites, make friends there... share your content with them Write decent articles and submit to ezinearticles.com Pay for 1 or 2 press releases (decent ones!)
Hi updated content(no duplicates) no keyword stuffing Keyword relevancy site map Good look and feel target keywords while submitting to directories,social sites,article and press releases submission sites with signature links. Link to high pR sites than you have. All the above factors contribute to quality back links. www dot wwwinabox dot com
Create a piece of linkbait and submit it to all the major social media sites. If you want to cut to the chase, buy links.