Actually, it’s easy as 1, 2, 3, 4. And what is it that’s so easy? Switching between the Finder’s four views, that’s what. Open a Finder window and try: all it takes is ⌘-1, ⌘-2, ⌘-3, and ⌘-4.
Below: one window, four ways. (Click a thumbnail to start the slide show.) The View is a window-by-window setting, so if you want to see icons in one window, and a list view in another, go right ahead. Just do it from the keyboard instead of using the mouse. It’s a lot faster.