HOWTO protect your online privacy now that the Senate repealed the Fourth Amendment?

Boing Boing reader Lee sez, "Now that my own government has killed the 4th
amendment, how do I protect myself? I know the basics of file
encryption; I've even started to use Tor. I use OSX 10.5 at home, and
Windows 2003 behind a corporate network at work."

Good question. I use Ubuntu Gutsy Gibbon and have some nice disk encryption tools, ssh tunnels for my email and other routine communications, and Tor for firewall circumvention and rudimentary privacy, but I'd love to know more, too. Go to it in the comments.