I Cmd+M the ones I want to keep around but don't plan to use right now. They go in a smaller mode below a divide line on Exposé. Also I tell the Dock to "minimize into the application icon".
Document window + Application icon + Exposé can really scale up, to the point I rarely ever use Spaces (when I was an avid user of virtual desktops under Linux).
Document window + Application icon + Exposé can really scale up, to the point I rarely ever use Spaces (when I was an avid user of virtual desktops under Linux).