Don't forget that just about everything in OSX and Linux supports readline navigation:

  C-n - next line
  C-p - previous line
  C-f - next char
  C-b - previous char
  C-a - beginning of line
  C-e - end of line

I assume there are others as well, but that's pretty much what I use.

There's a load of this that can be quite heavily customised as well.

Changing the contents of '~/Library/KeyBindings/DefaultKeyBinding.dict' modifies text editing behaviour system wide - though not all applications will honour it. I assume it's due to developers implementing their own text engine type stuff.

With DefaultKeyBinding.dict you can implement things like 'delete current line', 'move current line up/down', 'duplicate line' etc. and have these as keybindings almost system wide. It's very nice, but really grates when I work in an application that doesn't support it.

Mine is here: https://gist.github.com/ryecroft/7433433 (a bit messy, but has loads of examples I've found).

Brett Terpstra [1] has a good series of posts RE: DefaultKeyBinding.dict. I always refer back to this one when I want to start playing with it again:

[1]: http://brettterpstra.com/2011/08/13/keybinding-madness/

And C-d for removing a char, opt/alt-backspace to remove a word backwards, and I think opt/alt-d to remove a word forwards?

ctrl-k for kill ring ctrl-y for pasting from ring cmd-a for selecting all text

Wow, I never knew these. Thank you!

Thanks for the tip!

My new favourite: Cmd-option-ctrl-[ and Cmd-option-ctrl-] to switch between devices (iPhone, iPad, simulator, device, etc.)