The best SEO is one you generate yourself. No other business can effectively create the personalized SEO that you yourself can create. You've got some great advice already to do that. Using a Wordpress site, blogging at least once a month, having a lead capture form on your website that leads to client engagement, and offering client referral incentives will give your biz a great start. Yoast SEO plug-in for Wordpress is also very helpful.