Stop crying for onions.

Before cutting them put them shortly in boiling water and then immediately in cold water.
If you need to peel them you may simply do so under flowing tap water. You will never cry again.

For shining tableware.

Cut a potato in half, wipe with it all your forks, knives, spoons, then shine with a cotton cloth.

Test your preferred ground coffee mix.

If it is a good, natural product ground coffee floats and does not color cold water.
It is does sink or stains the water, beware...the coffe was mixed with other stuff.

Garlic to heal cuts and small wounds.

Use the very thin garlic skin applying it on the wound.
The result is immediate: the skin adheres to the blood and the wound closes up.
Please note that garlic is also a natural antibiotic.

To avoid yellowing of your books stored in a box

Put some laurel leaves (Bay leaves) in between the pages.

Headaches?

Try to breathe over a glass where you dissolved half a tea spoon of salt in vinegar.