Don't let people drive you crazy when you know it's in walking distance.

Don't let your status become too quo!

Don't look back, the lemmings might be gaining on you.

Don't look now, but the man in the moon is laughing at you.

Don't look now, but there is a multi-legged creature on your shoulder.

Don't lose
Your head
To gain a minute
You need your head
Your brains are in it.
		-- Burma Shave

Don't make a big deal out of everything; just deal with everything.

Don't marry for money; you can borrow it cheaper.
		-- Scottish proverb

Don't mind him; politicians always sound like that.

Don't patch bad code -- rewrite it.
		-- Kernighan and Plauger, "The Elements of Programming Style"

Don't plan any hasty moves.
You'll be evicted soon anyway.

Don't put off for tomorrow what you can do today because
if you do it today, you can do it again tomorrow.

Don't put too fine a point to your wit for fear it should get blunted.
		-- Miguel de Cervantes

Don't quit now, we might just as well
lock the door and throw away the key.

Don't read any sky-writing for the next two weeks.

Don't read everything you believe.

Don't relax!  It's only your tension that's holding you together.

Don't remember what you can infer.
		-- Harry Tennant

Don't say "yes" until I finish talking.
		-- Darryl F. Zanuck

Don't shoot until you're sure you both aren't on the same side.