Bite the bullet
To endure a painful or unpleasant situation that is unavoidable.

Carry the weight of the world on one's shoulders
To feel a lot of pressure or responsibility.

Face the music
To confront the consequences of one's actions.

Put one's best foot forward
To make the best possible effort.

Step up to the plate
To take on responsibility or a challenge.

Take the bull by the horns
To deal with a difficult situation directly.

Shoulder the burden
To take on responsibility or a difficult task.

In the driver's seat
To be in control of a situation.

Walk the talk
To act according to what one says.

Own up to one's mistakes
To take responsibility for one's errors.

Pay the piper
To face the consequences of one's actions.

Take charge
To assume control or responsibility.

Rise to the occasion
To meet a challenge or responsibility.

Make ends meet
To manage one's finances responsibly.

Hold the fort
To maintain responsibility in someone's absence.

Toe the line
To follow rules or orders.

Burn the candle at both ends
To work excessively hard without regard for one's well-being.

Keep one's nose to the grindstone
To work hard and stay focused.

Be accountable
To take responsibility for one's actions.

Take the high road
To act with integrity and responsibility.