I just noticed this ... If you rename a file in the Finder, you can delete words in the name all at once. Meaning you can delete one complete word at a time.
Make a new folder "New Folder" then enter re-naming mode. The cursor is now at the end of the folder name. Now press and hold "alt" when erasing (what would have been) a letter in the name.
The Finder automagically deletes one word at a time.
It even works in reverse. Try going to the start of the filename and doing the same thing agin... presto! deleting one word forwards.
Pretty neat; I can't remember ever reading this before, so tell me if it's old news.
[Editor's note: You can also use the arrow keys to move a word at a time with alt, or select a word at a time with shift-alt. I haven't seen this trick anywhere else, either!]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020219010209279