don't count your chickens before they're hatched

(informal) hands off! paws off! mitts off!

(informal, derogatory) in the sticks, in the middle of nowhere

(informal) to be not much to look at

the apple does not fall far from the tree, a wild goose never laid a tame egg

(figuratively) to take the plunge; to go for it

it's not worth it; there's no point; the game is not worth the candle

(informal) to not hurt a fly

barking dogs seldom bite, one's bark is worse than one's bite, all talk no bite

(informal) on the double, at a run