Here are some easy steps which can help you in building a link network :Social Media :
Share your posts and links on the social media sites. Set up free accounts with Twitter and Facebook like social media and start building backlinks through social sites.
Commenting on Social Sites :
Search the relevant topics and search for the sites and blogs with relevant theme to your site and post your valuable comments. Post natural and genuine comments in the conversation with helpful content.
Forum Posting :
Almost similar to commenting, you can share your ideas on popular forums. And here you can leave links in your signature.
Always try to post a relevant and valuable content in your website. A number of people will actually search for your site if you have a really good informative content.
Social Bookmarking :
Start using social bookmarking on websites which suits your catagory so that you can generate a backlink to your site.
Directory Submission :
Start submitting your website to directories. They will also help you in generating a back link to your site.