None of those things will help you. To the NSA, the content of your email may be less important than with whom you are communicating. Yes, the care about the content of some emails, but their dragnet appears to be for network analysis -- sender, recipients, date, time, etc. The NSA almost certainly catalogs every DNS lookup you do. This is the stuff that is erroneously being referred to as metadata.
One possibly surprising way to keep your communications private is to read/post your communications to a very public forum. That way the intended recipient is difficult to determine. Keep the communication slightly covert -- a little steganography goes a long way if you can fly under the radar. Just don't trust others with your privacy.
Our rights are inalienable -- but only if we use them.