http://rammichael.com/7-taskbar-tweaker
This is a great little app. I use it for two things (but there are many more features):
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1. Double click anywhere on the blank part of the taskbar and it shows the desktop (minimizes everything else). No more searching for the bottom right-hand corner spot.
2. Scroll your mouse up and down while hovering over the taskbar - it gives you the volume mixer and you can increase or decrease with your mouse. No more looking for that little volume icon.
These are small things but big annoyances when you do them all day long.
See the above pic for my settings but do as you like. Works on Win 7 and Win 8.
Windows 8 is practically the same as Win7 but every new OS makes me find new apps to make life productive and easy.