I asked, just to keep her head in the game.
I would keep my head down for the first few days at least.
All she could do was try to keep her head above water.
I'd rather keep my head down, after what happened the last time.
All you had to do was keep your head down.
All he had to do now was keep his head above water.
You seem to have kept your head and thought of everything.
The woman kept her head down and did not answer him.
You just had to keep your head up and eyes open.
You do want to keep your head if at all possible.
Idiome