PC Magazine has a great article on extending your laptop’s battery life. The article contains suggestions that we are all familiar with such as dimming your screen and not using the DVD drive. However the article also contains more substantive tips.

Some of these include:

Turn off ports. Disabling unused ports and components, such as VGA, Ethernet, PCMCIA, USB, and yes, your wireless, too. You can do this through the Device Manager or by configuring a separate hardware profile (see next step).

Create Power-Saving Hardware Profiles. Configure your laptop for the various scenarios in which you use it (on a plane, at the coffee shop, at the office, and so on). You can do this through the Hardware Profiles menu by right-clicking on My Computer and selecting Preferences or by using a freeware utility such as SparkleXP (for Windows XP users).

Configure your display to turn off when not in use. This is different from just using a screensaver, because in many cases a screensaver still requires the display’s backlight to be on. You can set the interval to turn the display off in Windows’ Power Options—found in the Control Panel.

The article contains several more tips, all of which will help you extend your laptop’s battery life. i urge you to check it out.