Your character has just pulled an all-nighter. Why? Did he have a work deadline to meet? Did she just met the new love of her life? Were they plotting revenge against the cook who refused third helpings on desserts, even though they're royalty?
And what effect is this having on the character? Sleepy, barely able to keep his eyes open? In a towering rage if someone looks at her sideways? Smearing paint in art lessons? Accidentally gutting the fisherman instead of the fish?
Think about how it all plays out, beginning to end, and write it.