I work for a home builder. Both my boss and his wife are very frugal. Just a few...
We built our office. It is very well insulated. The air stays set on 78 and rarely runs. The heat never goes above 68. (and we're a business with customers coming in and out)
We have an unspoken 3 sheet TP rule.
We have a cabinet with hand towels in it for employees to use, so we don't waste paper towels.
All paper gets used on both sides.
We reuse any envelope that we can.
My boss indulges in coffee from the corner store every morning, only he reuses his cup until it falls apart, so he can get the refill price (48 cents)
He sent the office a memo on getting gas - get gas before you are at 1/2 tank, never pump at full speed, and get gas in the morning. All allow you to get more gas by reducing the fumes. Gas is measured by the fumes recaptured.
We save any bubble wrap, peanuts, boxes, ect that we receive to reuse.
The a/c must be shut off on all vehicles before the engine is killed.
When he goes to conventions, he packs a pb&j sandwich and eats between classes so he doesn't have to purchase a lunch.
I know there are plenty more too.
Debbie