I have uploaded one of my favorite UI setups that I use for a preset in one of my workflows.
It is designed around 4 3D Views for a true quad view as apposed to the limited built-in CTRL+ALT+q quad view.
http://www.pasteall.org/blend/22295 --I will permalink it soon
There is also another unique feature I have never seen anyone else do. I number my screens so I can easily change the order and use the CTRL+Left|Right Arrow to navigate from screen to screen in my workflow. Notice that the last one is set by using ‘z’ to put it on the bottom of the list for backing up to it.
I devised this method to have my screens in a more workflow centric manner.
I would like to see some other peoples’ favorite UI setups for workflow. Please post them here so we can start a collection to share.