Don't be too clever for an audience. Make it obvious. Make the subtleties obvious also.

One's too many, and a hundred's not enough.

If there's anything I hate more than not being taken seriously, it's being taken too seriously.

Too clever is dumb.

What good is a character who's always winking at the audience to let them in on the secret?

You have to have a dream so you can get up in the morning.