1. Barrels of Oil: When the first oil wells were drilled they had made no provision for storing the liquid so they used water barrels. That is why, to this day, we speak of barrels of oil rather than gallons.
2. Sleep Tight: Early beds were made with a wooden frame. Ropes were tied across the frame in a criss-cross pattern. A straw mattress was then put on top of the ropes. Over time the ropes stretched, causing the bed to sag. The owner would then tighten the ropes to get a better night's sleep. Also, those straw mattresses were full of bugs, so thus the expression: "Good night, sleep tight, and don't let the bed bugs bite."