Good. It's about time you started thinking defensively.
I think it's about time to move him from his cradle to his crib.
If you don't have anyone to tell you how smart you are, it's about time you start doing it yourself.
I think it's about time to let you know who's...
"I think it's about time we get you in bed before that stuff makes its rounds of your bloodstream," Dean said with a mock stern look.