My recent article on keyboard shortcuts generated a number of valuable responses.
PeterC (seconded by Chris@SAS) mentioned that Ctrl+i, available in EG 4.3, would automatically re-indent my code and thereby tidy it up. A very recommendation, but sadly the client in question is still running SAS 9.1.2 and hence EG 4.1.
Angela@SAS said that one of her favourite keyboard shortcuts is ctrl+? (properly known as ctrl+/). It's probably my most-used shortcut too. Ctrl+/ turns the selected lines into comments; and ctrl+shift+/ removes comments from the selected lines.