Windows 7 introduced a new taskbar that makes navigating through your computer and windows even quicker. There are new ways you can preview open windows, make commonly used programs easily accessible and the ability to pick where your icons are in the taskbar.
Shows previews of open windows.
Ability to pin items to the for easy accessibility.
Can move items to where you want them on the taskbar, just click and drag them to the desired place on the taskbar.
Here is a tutorial as well as a link to Microsoft's website on the new and improved for Windows 7: