How do we practice separation of church and state?

I say we just take a look at what the Framers had to say about the 1st Amendment and the whole discourse on Seperation. It is EASY to avoid the Up/Down, Right/Wrong crap when religion is kept out of the public venue IN TERMS OF GOVERNANCE. Just consider what Madison (an architect of the Bill of Rights and the early amendments) had to say about religion.
“Is the appointment of Chaplains to the two Houses of Congress consistent with the Constitution, and with the pure principle of religious freedom? In strictness the answer on both points must be in the negative. The Constitution of the U. S. forbids everything like an establishment of a national religion.”
And then goes on to say. “The establishment of the chaplainship to Congs is a palpable violation of equal rights, as well as of Constitutional principles:”
He says much the same about military chaplains.
James Madison, Detached Memoranda/ca. 1817W. & M. Q., 3d ser., 3:554--60 1946
http://press-pubs.uchicago.edu/founders/documents/amendI_religions64.html
I am not interested in hearing ANY RELIGIOUS DISCUSSION other than a general condemnation of it.

Keep your beliefs to yourself. Stop proselytizing.

Easy. The government has no say on what happens within the walls of a religious building, and the religions have no say on what happens in the government/the country.