Laptop Battery Conservation Tips?

Since it seems everyone is on the subject of batteries on this forum, what are time-tested ways to maximize a laptop battery's life? The only tenets I know are to completely drain a battery before plugging it in, and to keep it cool, since heat apparently makes a battery wear down faster.

Battery Tips
If you find yourself with no electrical adapter or power source and need your battery to operate for as long as possible, take good care of your laptop battery and ensure that it will be ready to work properly and efficiently in the battery mode. The general tips are listed as follows: 1.Turn off Wi-Fi and BlueTooth - Most laptops have shortcut keys to instantly disable wireless networking.2. Don't play computer games, music or DVD movies - Multimedia activities drain laptop batteries.3. Disconnect all external devices like PC Card modems, Firewire, USB devices and optical drives. Use the notebook touchpad instead of an external mouse.4. Adjust your screen brightness - Dimming your display saves battery power. 5. Tweak Windows Power Options - Choose a Laptop power scheme that turns off the notebook monitor and hard disk after 10 minutes of inactivity.6. Decrease or mute the Laptop Speaker Volume.7. Turn off all scheduled tasks.8. Turn off Auto-save features in Microsoft Office and other applications.9. If your PC has a built-in wireless card, turn it off or disable it when not in use.
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You could undervolt and underclock your processor with RM-Clock:

http://cpu.rightmark.org/products/rmclock.shtml

All it really can do is make your CPU run in idle or at a reduced speed and voltage to conserve power. If you really get into it though, you could try to run your CPU under it's official voltage or speed, but the utility doesn't always work outside of the specified voltage and speed levels (you can't overclock though). Remember that the more power you use, the more energy you spend on making everything work AND cooling everything even more, so power drain is more of a quadratic or cubic function than a liner function.