- C-u to kill (cut) from current location to beginning of the line

- C-k to kill (cut) from current location to end of line

- C-w to kill (cut) from current location to beginning of word

- C-y to paste (copied / cut) lines

- C-l to clear screen (I use the shit out of this)

- Ctrl + shift + '-' (holding ctrl, shift, minus at the same time), for undo.

That is it.

EDIT: Damn it, I didn't realize I was saying a bunch of the same things as you did.

EDIT2 Thanks oinksoft for clearing up C-u and C-w.

C-u kills from cursor to start of line.

C-w kills from cursor to start of previous word. M-d is its friendly forward sibling.

I never noticed C-u was from cursor. I tend to use it mostly from the end of the line.

I guess lots of people leave C-a as the default escape key for screen.

If you go through the command history and press CTRL-o on a line it will be executed and the command on the commandline will be replaced by the next line in the history.

With a numeric prefix argument N, it grabs the Nth-from-the-end argument of the previous command, so M-3 M-. grabs the 3rd-from-last argument from the previous command.

  $ stat /tmp/foobar
    File: `/tmp/foobar'
    Size: 0         	Blocks: 0          IO Block: 4096
    ...
  
  $ rm -v $_
  removed `/tmp/foobar'

That way, you can have two different things on your clipboard without having to use a fancy clipboard manager. (Or, alternatively, you can be confused why the thing you're pasting isn't the thing you thought you copied last.)

These work in most GUI inputs as well.

But yes, the keybindings work in Cocoa text controls, too, for example in TextEdit, in the Safari URL/search control, etc.