Easy
Better late than never
Better to arrive late than not to come at all (used by itself)
Hang in there
Don't give up (used by itself)
Pull yourself together
Calm down (used by itself)
Birds of a feather flock together
People who are alike are often friends (usually used negatively) (used as part of a sentence)
Break a leg
Good luck (used by itself)
Hit the sack
Go to sleep (used by itself)
That's the last straw
My patience has run out (used by itself)
Bite off more than you can chew
Take on a project that you cannot finish (used as part of a sentence)
So far so good
Things are going well so far (used by itself)
It's not rocket science
It's not complicated (used by itself)
We'll cross that bridge when we come to it
Let's not talk about that problem right now (used by itself)
Let someone off the hook
To not hold someone responsible for something (used as part of a sentence)
The best of both worlds
An ideal situation (used as part of a sentence)
Call it a day
Stop working on something (used as part of a sentence)
A perfect storm
the worst possible situation (used as part of a sentence)
To get bent out of shape
To get upset (used as part of a sentence)
Give someone the benefit of the doubt
Trust what someone says (used as part of a sentence)
Get out of hand
Get out of control (used as part of a sentence)
Wrap your head around something
Understand something complicated (used as part of a sentence)
Let the cat out of the bag
Give away a secret (used as part of a sentence)