I have been successful at keeping my true feelings from my wife and others for more than 15 years. I came to understand a long time ago that this was just the way things had to be. But for the most part, I live my life the way I want to live it. And in doing so I have brought the art of living a "double life" to new highs. For one, I'm a big fan of Public Key Encryption, and a program called PGP Disk. In a nutshell, I have an area on my drive (PGP Disk) that is protected with military grade encryption. (4096 bits - AES-256.) And I use a strong passphrase that is only kept in my mind. All my files and email that could get me DF'ed are kept there, and they can be encrypted with the touch of one "hot key."
I also use a program called CCleaner. It is by far the best I have found at wiping all traces of where I have been online.
I have also made use from time to time of Hushmail.
Some would say I act paranoid. But are you being paranoid when they really are out to get you?