Onions - Extend their shelf life
Store your whole, unpeeled onions in a nylon stocking., or cut an old pair of panty hose legs.
Put twist ties in between or tie them in a knot, before adding the next onion. I found twist ties a little better, because when I first began doing this, taking an onion out from unknotting it was a pain. When they hang, the knot gets tighter. Twist ties, you can reuse the stocking again..because you might get tempted to cut the stockings inbetween to get them out, if they are knotted...but that's just a suggestion.
Hang them in a basement or somewhere cool and dark.
Freeze green onions in a plastic bottle. Make sure the green onions are completely dry before storing or they'll get freezer burn.
Use a vinegar solution to make your berries last longer.
Spray leftover guacamole with cooking spray before putting it back in the fridge.
Store potatoes with apples to keep them from sprouting.
Add a dab of butter to the cut side of cheese to keep it from drying out.
Wrap the crown of a bunch of bananas with plastic wrap.
Wrap celery, broccoli, and lettuce in tin foil before storing in the fridge.
Keep ginger in the freezer.
Keep mushrooms in a paper bag, not a plastic bag