Here's a time saving tip for Mac users. When you're in an Open/Save dialogue the keyboard shortcut Shift ~ will bring up a CLI style folder navigation window that lets you easily type the path to a folder. Even better, the path window features bash-style tab complete. Type the first letter of the folder, press Tab and it will auto-fill the name. Press tab again and type the next letter and so on. Perfect for keyboard junkies.

I can't believe I've been using OS X for six years and I never knew this. 

There are some other keyboard-based navigation shortcuts for the same Open/Save dialogues, including Apple-D which will jump to your Desktop folder and probably more I don't know about, but feel free to educate me in the comments below.

This handy tip comes [courtesy of OS X Daily][1]. 

[1]: http://osxdaily.com/2007/02/14/geek-gui-in-mac-os-x-opensave-dialog-boxes/ "Geek GUI in Mac OS X Open/Save Dialog Boxes"