A tip for people looking not to get caught while surfing

Don't maximize the window for your web browser, but instead leave about an inch open on the side. Then have a maximized window with some work (or at the very least, a word document or something similar) open 'underneath'.
If you need to make a quick switch (i.e. coworker footsteps approaching), quickly click off to side in the one inch gap you've left yourself and the window is hidden immediatly.
No keyboard buttons to hit or tiny minimze icons to click on