If I knew that answer, I would be busy creating them!
This is of course only partly true. I have some general ideas, including the ability to gain education credits for demonstrating knowledge, regardless of where you got it; theaters, galleries, publishers, and meeting places (online and offline) led by those trying to move beyond postmodernism; the elimination of incorporation so people can come up with more innovative types of firms; radical decentralization so the local is overwhelmingly the most important government in your life (so you can have much more realistic voice and exit options). I gave a few hints in the piece. The idea isn’t to spread my ideas of what kinds of institutions ought to exist, but to encourage experimentation in institutional design from a variety of sources — let a million ideas bloom! — and then let natural selection have its way with them all.