On the Edit Plan Settings page, you can alter the amount of idle time that must elapse before Windows Vista turns off the display and puts the computer into sleep mode. You can access more granular configuration settings by clicking the Change Advanced Power Settings link, which displays a Power Options dialog box with a single tab titled Advanced Settings.
As you can see, in addition to the more common power settings, there are a host of power consuming devices for which you can adjust settings. For example, you can regulate how a wireless adapter consumes power by choosing maximum performance or low, medium, or maximum power savings, as shown here.