Nose to the wind

Coming up with sayings that have you use a body part to say keep alert or work hard such as:
Keep your nose to the grindstone
Keep your ear to the ground
Keep your eye on the ball
Keep your nose to the wind

Are there others?

Keep your finger on the pulse
Keep your foot on the gas
Keep your mind on the game

and still more, I'm sure.

Keep your eye on the ball
Shake a leg

Shoulder to the wheel.
Put your back into it.
Keep your eyes peeled.

get a leg up
Hold your feet to the fire
Break a leg
Bust your balls
Toe the line

Body parts but not work or motivational oriented:
Sucking hind t i t
The cold shoulder
Wet behind the ears
Albatross around your neck
Box your ears
Eat your heart out
Make no bones about it
Bite your tongue
Brown nosing
Down in the mouth
Tongue in cheek
Armed to the teeth

Shake your moneymaker.

Keep on your toes
Get your butt in gear

Tongue in cheek

Some or all of these may be exclusively British, and all mean much the same thing.

"Keep a stiff upper lip"
"Keep your chin up"
"Keep your head held high"
"Keep your pecker up"

Gut wrenching
Lame brained
Get your leg over
Keep your hand in
Keep your nose out