You can either do it yourself by linking website to a certain of pages on Forums, Websites. You can also buy any other services that can get you these type of backlinks.
There are a lot of services that you can look for though. But my suggestion is to use Backlinking4SEOSite.com, those guys are unbelievable. Working fast, and great communication. I've been using them for a long time, and got my websites ranked on 1st page within 3-5 weeks.