Important is the marketing, advertising and marketing, but if you want to invest it is best that you invest in marketnig and promote their work on the "SFI".
Always watch free solution, use social media primarily for the promotion, and if that is not enough, you can always invest in some advertising, if that is not enough.
Best to you to make a website or blog it slip SFI links and banners, and so it promotes your site!
