“Hang by a thread”

“It’s not rocket science”

It’s not very complicated.

“Take it with a grain of salt”

To not completely believe something.

“Bite off more than you can chew”

To take on too much responsibility.

“Break a leg”

A way to wish someone good luck.

“Actions speak louder than words”

What people do is more important than what they say.

“By and large”

Generally; mostly.

“By the book”

According to the rules.

“Fall by the wayside”

To fail to continue or be forgotten.