"BETTER LATE THAN NEVER"
MEANING: Better to arrive late than not to come at all.

"BREAK A LEG"
MEANING: To wish to someone good luck.

"IT'S NOT ROCKET SCIENCE"
MEANING: It's not complicated.

"YOU CAN SAY THAT AGAIN"
MEANING: That's true, I agree.

"THERE ARE OTHER FISH IN THE SEA" :c
MEANING: It's ok to miss this opportunity. Others will arise.