I just discovered that in cocoa apps like text edit, if you hold option + delete, it deletes whole words! It ma not be new to you, but I've never seen this trick posted anywhere.
That's been around since OS 9 I believe... Very handy. Option-forward delete does the rightmost word. Try holding option when using the arrow keys in text fields/boxes, too.
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It works in every app doens't it?
I kind remember this from some other time...but I never use it.