You may also want to see DotFiles/X11, which contains a lot of my X11 server configuration tidbits.
Recreate basic xorg.conf on Debian-based systems
1 sudo dpkg-reconfigure xserver-xorg -pcritical
Sleep a display
This is useful when you know you'll be going away for a while, and immediately want your displays to go into sleep mode.
1 xset dpms force off