164. Don’t sulk.

You’re too old. 

It’s not cute.

It’s really irritating.  

165. Don’t threaten.

Follow through is the pits.

You undermine your credibility.

You might lose.

There’s no place left to go. 

166. Don’t use profanity.

It’s never in good taste.

It brands you as a low brow.

You get left off important guest lists.

It demonstrates your limited vocabulary.