ask for link exchange in the forum, d/load some free/demo s/f for developing link, also u can buy paid links in good big websites.
Link exchanges aren't as beneficial as they once were, so are paid/buying links. I suggest you build backlinks by guest blogging, article submission, forum/blog posting... there are numerous other methods. You can also build links through social media. Hope that helps. Have a good day!
There are countless different strategies you can use. The trick is to use multiple strategies to make your link profile look more natural. For ideas, check where your competitors have links. Also do some reading about link building. You will be sure to find some strategies to use. Some strategies do work better for some niches and not so well for others.
1) Get good quality backlinks from high PR websites. 2) Link exchange... make sure you link exchange with a high quality website, not just for the sake of SEO as google will penalise you for that (after many updates). 3) Just stay natural, use forums, and guest posting. Good luck! Check out my multi-author website, promoteyoursites.net for more info on SEO, advertising campaigns, link building, and generating more traffic.