You can instantly print an items full path in the Terminal by dragging and dropping any Finder item into a Terminal window.
In the screenshot above, I have dragged Quartz Composer into a Terminal tab while nano was open. The full path is then typed out automatically, as shown in the screenshot below:
The next time you’re in the Finder and want to access a file or directory within the terminal, try this out, I find it’s quicker than using tab completion for deeply buried files.