One way to keep your feet on the ground is to put a heavy responsibility on your shoulders.
Body Quotes
This is my house – it is not I:
O flesh, flesh, how art thou fishified. (Romeo and Juliet)
Have both feet on the ground.
The human body is a machine which winds its own springs.
I will give out divers schedules of my beauty. It shall be inventoried; and every particle and utensil labelled to my will: as, item, two lips, indifferent, red; item, two gray eyes with lids to them; item, one neck, one chin, and so forth. (Twelfth Night)
Cold feet.
Our minds are lazier than our bodies.
Instead of frittering away your vibrancy with worry or distraction, realize your mind and body are inextricably united. What calms and tones up one, soothes and improves the other.
Cold hands, warm heart.