If you separate your bananas when you get them home they will last longer than if you keep them on the stem.
If you store your opened cheese in aluminum foil they will last longer and it will not mold.
And if you add a teaspoon of water to your ground beef while cooking it, it will help pull the grease away from the meat while cooking.
I would love to have a copy of this book – Emergency Food Storage & Survival Handbook. I’ll have to keep my eyes open and see if I can find a copy in the numerous places that I get books for dirt cheap and/or free.