Don't shout for help at night.  You might wake your neighbors.
		-- Stanislaw J. Lec, "Unkempt Thoughts"

Don't smoke the next cigarette.  Repeat.

Don't speak about Time, until you have spoken to him.

Don't steal... the IRS hates competition!

Don't steal; thou'lt never thus compete successfully in business.
Cheat.
		-- Ambrose Bierce

Don't stop to stomp ants when the elephants are stampeding.

Don't suspect your friends -- turn them in!
		-- "Brazil"

Don't sweat it -- it's only ones and zeros.
		-- P. Skelly

Don't take a nickel, just hand them your business card.
		-- Richard Daley, advising on the safe enjoyment of graft

Don't take life seriously, you'll never get out alive.

Don't take life so serious, son, it ain't nohow permanent.
		-- Walt Kelly

Don't talk to me about naval tradition.  It's nothing but rum,
sodomy and the lash.
		-- Winston Churchill

Don't tell any big lies today.  Small ones can be just as effective.

Don't tell me how hard you work.  Tell me how much you get done.
		-- James J. Ling

Don't tell me I'm burning the candle at both ends -- tell me where to
get more wax!!

Don't tell me that worry doesn't do any good.
I know better. The things I worry about don't happen.
		-- Watchman Examiner

Don't tell me what you dream'd last night for I've been reading Freud.

Don't try to have the last word -- you might get it.
		-- Lazarus Long

Don't try to outweird me, three-eyes.  I get stranger things than you free
with my breakfast cereal.
		-- Zaphod Beeblebrox

Don't vote - it only encourages them!