Reinstate common land for a start.
In terms of how we replace the state is a big question, which has been debated and fought over since the nation-state as we know it first came into existence 500 years ago.
Personally, I would favour the decentralisation of power - local, democratically-run municipalities joined as a conferation, dealing with local issues and policies, which elect easily recallable delegates to represent each community on wider issues which benefit from the efficiencies of scale, such as healthcare, transport, and public utilities.