If you don't have an idea burning a hole in your brain, and can pass up the extra income, at least for the moment, you might consider contributing to one or two

If you don't have an idea burning a hole in your brain, and can pass up the extra income, at least for the moment, you might consider contributing to one or two open source projects. It'll give you exposure to a new code base, earn you some community good-will, and be a genuine differentiator when you do go looking for that new startup/consulting/whatever gig.