Increasing website traffic can take some time. At 3 months old your website may still be in googles sandbox.
Too increase search engine traffic make your titles using long tail keywords and write your website articles with long tail keywords as well.
The long tail keywords are less searched but they have much less competition.
Make sure you let the long tail keywords in your website articles or blog posts flow naturally. But don't just write for search engines only. Write the blog posts for people as well and make sure they're quality articles and really helpful.
While waiting for search engine traffic you should also sign up for a twitter account if you haven't already and follow twitter accounts that are related to your website's content.
You can get some good traffic through twitter, facebook and other social media networks.