I have far too many windows open to display everything at once, even with my 3 widescreen monitors (the curse of being a developer). I usually need about 4-5 workspaces to organise everything. Sometimes more. Often there are also multiple windows arranged on a single screen (I use tiling, so windows never overlap). I know by heart which application is on what workspace and screen (because it's always the same). Because each workspace has a hotkey (Win + a numbered key) I can instantly pull up any window that I need, without searching for it.