That's my way too. A single click is always simpler than navigating a task switching interface, so I just have "big window" on left, "mid size window" peeking out at its right edge, and then "little window" - usually textedit - poking through in back. It's like a little sideways pyramid. I can also alt-tab through them super easy. Never found much use for Expose or Mission Control, i consider having to use them an organizational fail state for my process.
Do yourself a huge favor and check out SpectacleApp. It's Windows image resizing brought to Mac OSX and it's really neat. 100% free and open source too with sensible defaults unlikes it's competitors.
(I have the same 'windows everywhere, all just partially visible' approach that the parent commenters have).
I can't see how this app (and other layout managers) would help this workflow. I don't move or resize windows. They are all where I want them to be, albeit stacked on top of each other. You click (or keypress) to pick the window you want to use, then use it. No window movement necessary.
