Making screen shots better

[zabom]

I have begun collecting screen shots of various zones to use as desktop graphics. What I have been doing, is making all windows invisable long enough to take the shot. That is a major time consuming pain. What I would like is a simple button or hotkey combo that will toggle all windows open/closed or visable/invisable. Is this possible? If not, are there any suggestion for an easier way to get a clean interface free screenshot?