You got to be careful of the company you keep.

I don't have to be careful, I've got a gun.

I've got to be careful what I say but Glenn Mulcaire was a blagger and a phone hacker.

All great sci-fi is: Be careful what you wish for.

You have to be careful to react when you start to deviate from your course.

You have to be careful how you're using the word boycott.