Expand, grow, conquer.<p>- Hire a few contractors to grow your stable of apps.  You seem to know what works.  Expand on what you're doing so you can do more of the same.<p>- Build your brand, that way you can use the market you've built to transfer interest from one app to other apps, (as you've been doing on line with your excellent blog posts).<p>- Figure out a way to diversify your revenue stream.  You're already concerned about the app store closing or changing.  Hire someone to port the apps to Android.  I think that's a long term play, but if Android takes off, I think there's a large upside potential.