Old expressions that no longer apply

"Don't air your dirty laundry in public"

Used this last week with one of our younger engineers who was complaining about the company to one of our vendors, he gave me a puzzled look but came to me a few days later and thanked me for the advise.

My Grandfather always said a job isn't done until "5,6 and 7,8"

One two buckle my shoe........

Pick up sticks and set them straight.