Don't bite the hand that feeds you.
Don't judge a book by its cover.
Don't kill the goose that lays the golden egg(s).
Don't put all your eggs in one basket.
Don't put the cart before the horse.
Early to bed and early to rise makes a man healthy, wealthy, and wise.
Easy come, easy go.
Every cloud has a silver lining.
Every dog has its [his] day.
Every Jack has his Jill.
Everybody's business is nobody's business.
Every man has his price.