keep a level head

keep a level head

To maintain a calm demeanor and think clearly in a difficult, stressful, or troubling situation. I know you're anxious about this midterm exam, but just remember what we've gone over and try to keep a level head. You have to keep a level head during business negotiations or else you may end up getting the short end of the stick.
See also: head, keep, level
Farlex Dictionary of Idioms.

keep a level ˈhead

remain calm and sensible, even in difficult situations: She managed to keep a level head when all the others panicked. OPPOSITE: lose your head ▶ ˌlevel-ˈheaded adj.: Nurses need to be level-headed.
See also: head, keep, level
Farlex Partner Idioms Dictionary
See also:
  • keep a cool head
  • on a knife-edge
  • even keel
  • keel
  • be under the cosh
  • cosh
  • hairy situation
  • breathe easy
  • get a grip of (oneself)
  • get a grip on (oneself)