Content Marketing, I know it is difficult and sometimes expensive but it is.
Off-Course SEO Companies completely analyze your competitors websites and make an effective plan to rank on your top keywords. They plan your off page activities like content marketing, Mobile Marketing, Social Media Marketing, PPC, Local SEO, Email Marketing & so on.
By offering content writing services to different companies, organizations specially like SEO or Marketing Agencies. OR He/She can sell their articles online.