Job, Study, overcome obstacles

To burn the midnight oil

to work or study late at night.

To pass with flying colors

to pass a test with a very high score.

To hit the books

to begin studying hard.

To learn the ropes

to learn how to do a specific job or activity.

To bite the bullet

to force yourself to do something difficult.

To face the music

to accept the bad results of your actions.

To go the extra mile

to do more than what is expected of you.

To wrap one's head around something

to understand something complex.