You really can't..........

Cry your eyes out..

Make a mountain out of a molehill
Or
Make a silk purse out of a sows ear

Bury your head in the sand.

Drink the well dry

Wait till the cows come home

Stick your nose in where its not wanted.

Rack your brains
Put on your thinking cap
Eat a horse

Wait on someone hand and foot.
Put your shoulder to the wheel.

Split your head open (the description of every head injury when I was young)
Work your socks off, or your fingers to the bone.
Sneeze your head off.

Eat for England
Hate with all your heart
Turn to stone
But can you
Love to death??

Chase your tail
Have eyes in the back of your head

After watching Mary Poppins, my very young daughter at the time asked "Can you really die laughing"

Laugh your head off.

Put your nose to the grindstone... well, you might but it would hurt like hell.

Laugh fit to bust
Turn the air blue
Cough up a lung
Run yourself ragged
Turn into a green-eyed monster
Make pie in the sky

Take a chill pill
Build sand castles in the air
Watch grass grow under your feet
Dodge a bullet
Rain cats and dogs (or men)
Stick your head in the clouds

Not quite on topic above, so here are a few more:

Have a fit (at will).
Suck it up.
Swear blind.

Be afraid just because something is e.g. not in stock (or similar)

I always get the giggles when people say "I'm afraid that was the last one" ... I want to say "Don't be afraid, it will be fine".

Cough your heart up.
Talk the hind leg off a donkey.
Give someone a hand.
Lend an ear.
Be two faced.

People have torn their hair out. It is possible but painful and disturbing.

Tear your hair out.

Wash yourself away

Smile 'till your face cracks.
Run your legs off.
Run yourself into the ground.

Break your heart
Walk your feet off
Swear black and blue
Talk until you are blue in the face
Work 24/7
Eat a horse
Drink like a fish