This one's especially for the laptop users gasping for their battery life. Well, WIndows 7 is equipped to provide you comprehensive information about the power consumption. You can use this feature to increase your laptop's battery life as well as performance. Here's how to get to it

1. Type cmd in the Start search to open the command prompt
2. When it opens right-click it and choose Run as administrator
3. Type in powercfg -energy in the command line and hit Enter

Windows 7 will scan your system suggesting ways to improve power efficiency. To find the results you must follow the path. Typically its in the System32 folder.