Do both On-page and Off-page SEO. On-page is the process of optimizing Titles, Keywords, Headings, Descriptions, Alt tags, external links and so on.
Off-page refers to selecting the proper keywords relevant to your business, checking the traffic, competitor analysis, generating backlinks, etc.
Participate in Blog and Forum discussions.
Post Blogs, Articles and Infographics.
Create Social Media pages for your company in all Social Media Channels like Facebook, Google+, Linkedin and Twitter. Next, start promoting your blogs and services in Social Media.