Can you give some examples of the use of left overs or things less prissy
people will keep instead of tossing. Using once brewed coffee grounds has
been mentioned. Twice cooked potatos don't qualify.

But how about keeping some orange peels for zesting? And how would one keep
them fresh for a couple of days? Anyone admit to tossing last night's
leftover gravy into tonight's batch?

Useful hints appreciated. Disgusting suggestions taken at face value. Some
cultures had hideous practices of burying things and then digging them up
later, like duck eggs. And some I won't even mention.

How about that vacuum sealing deal? Would that lengthen shelf life?

And suggestions about storing leftovers or like the half of the pack of
mushrooms you don't use tonight. (I keep them in a sealed zip-lock). Wish
I could get SWMBO to do that, as hers turn slimy and brown within a day, and
she hasn't caught on yet. She thinks if it has been in the refrigerator,
it's safe to eat. No matter how long.

Steve