Tip: Quick hard drive access from the Dock

Photoshop guru Ben Willmore uses this OS X technique to quickly access files on his Mac while he's teaching his popular Photoshop seminars. It's caught the attention of his students, even though they're supposed to be focusing on Photoshop rather than OS X. If it can distract people from learning Photoshop from Ben, I figure it's worth passing on:

Drag a copy of the hard drive icon from your Mac OS X desktop to the right of the vertical line on the right side of your Dock. (If your Dock is vertical drag the hard drive icon beneath the horizontal line near the bottom of the Dock.) Press and hold the hard drive icon on the Dock to reveal pop-up menus of your file structure. Now you can use the pop-up menus to quickly navigate your hard drive and access your files.