Bide your time.
There’s no time like the present
Forgive and forget.
Revenge is a dish best served cold
Never put off till tomorrow what you can do today.
Don’t cross the bridge until you come to it.
You’re never too old to learn.
You can’t teach an old dog new tricks.
A word to the wise is sufficient.
Talk is cheap.
It’s better to be safe than sorry.
Nothing ventured, nothing gained.
Don’t look a gift horse in the mouth.
Beware of Greeks bearing gifts.
Do unto others as you would have others do unto you.
Nice guys finish last.
Hitch your wagon to a star.
Don’t bite off more that you can chew.
Many hands make light work.
Too many cooks spoil the soup.
Don’t judge a book by its cover.
Clothes make the man.