Dragging Folders
Command terminals support dragging and dropping of folders into the terminal itself. This is great if you need to quickly cd into a location that is otherwise easy to get to.

Open Command
Open specific application or web pages from the command line.
open -a
open http://google.com

Say Command
Use the text-to-speech features of a Mac to speak out loud.
say type things here

pbcopy and pbpaste
Copy and Paste texted is available in the terminal as ‘pbcopy’ and ‘pbpase’. By piping these words into files or out from scripts gives quick access to anything pasted into the clip board.