I’ve come across this this great little app called “Taskbar Shuffle.” Essentially, what it does is enable you to re-order open windows in you taskbar, re-order notification area (or system tray) icons, and close open windows with a simple middle-click! You will never know how much you need it until you download it! Personally, I wouldn’t set it to start with Windows right away. I did this and found myself accidental closing open windows like Thunderbird while it was receiving mail. Later, once you get used to having it running, check the empty box in the options menu (in the notification area).
Download it here.