Add the Path button to Finder's toolbar

Mac Tip: Add the Path button to Finder's toolbar - Lifehacker:

"The Path button isn't included on the Finder toolbar by default, but you can add it by Ctrl-clicking and choosing 'Customize Toolbar.' Then drag and drop the Path button - which kind of looks like a staircase - onto the toolbar. From there, use it to see where you are in the folder tree, and move up to enclosing folders in a click."