If you're working with a file in OS X and want to move it around, copy it, or figure out where it is on your system, you can actually do all these things from the little icon in the app's title bar.
This feature's probably been around for awhile, but we never really knew how much you could do with those little icons. Clicking and dragging it into a Finder window or to the desktop creates an alias, while option-clicking and dragging will copy the file to wherever you want. You can also right click or command-click on it to see its containing folder, which is pretty useful. Check out the video above for a quick demo.
Mac OS X hidden features and nice tips & tricks [Stack Exchange]