Ask HN: I built a small software dev agency, what should I do next?

Reaching out to the HN community to get some fresh perspectives. Over the past several years of my life I've built a software development agency with $XX,XXX monthly revenue in a very "boring" industry -- it mainly boils down to building WordPress themes and plugins. (I don't find this boring, but it's not some hot sexy speculative thing that the media is gushing over and VCs are throwing money at.)

We have a couple people on payroll and three long-term anchor clients who pay the bills.

It all began with a few years of grit, pain and poverty grinding out projects on Elance -- an experience I'm reluctant to repeat (and which might be even harder these days).

But when I started looking at ways we could grow I realized I didn't know the first thing about marketing, sales and outreach. I thought a productized, done-for-you small business website might be easier to sell than our current service (easy to paint a value proposition, thousands of small business starting up all the time), and we got started on that, but I realized pretty quickly I don't know how to sell that, either.

What should I do next? Figure out how to market this product? Find a sales guy/cofounder who can help? Start from scratch because it's a bad idea? Turn my attention back to our corporate retainer business and figure out how to get more of those?