"Looking to take control of your PC? Looking to optimize your PC’s performance? The Task Manager is a great tool for these tasks, and it’s always just a couple clicks away. For Windows 8, the Task Manager got a major overhaul that includes a lot of great new features. In this post I’ll walk through some of these new features and enhancements, and I’ll also show you some lesser-known tips and tricks. In the included video (see bottom of post) I’ll show a whole bunch of cool tricks and time saving features in the Windows 8 Task Manager, be sure to watch it!"
Very good tutorial at Extreme Windows Blog: