Addons: Dominos or Bartender

I personally have only used dominos, but it has ten fairly simple and easy to manipulate bars. The buttons can also be given individual hot keys, however I do note that if you switch specs and the bars are not in the same place between specs, your hotkeys can be jumbled around.

http://wow.curse.com/downloads/wow-addons/details/dominos.aspx
http://wow.curse.com/downloads/wow-addons/details/bartender4.aspx

Just a personal setup