Secession is the only real hope. Maintain the free trade and common labor market, but get rid of the Euro and leave the political sphere. Losing your sovereignty to a national government is bad, but getting it lost to a multi-national government is even worse.
Move to Montana as fast as possible. The Libertarian Party has a Free State Project. After discussions and a poll they selected New Hampshire (pop 1.3 million). After the get 20,000 libertarians to sign up and commit to move to NH, they will be able to elect a libertarian legislature and governor and...