We all know you are supposed to eat breakfast "like a king."
And so on.
But what if a truly hearty morning meal makes you feel drowsy shortly thereafter? If you are among those for whom going back to bed isn't an option, that's less than ideal.
Experimentation is probably the answer. You can try all sorts of breakfast fare and see what works.
Or perhaps you could even consider going to bed earlier.
But of course, there's just one word to describe how most adults manage to stay awake.