Onions are best peeled underwater, this way you do not suffer from burning eyes.
Take some water in the mouth (do not swallow) and you will not cry when peeling the onion
In order to remove odors from onions knives, one can get live them by a flame.
Very simply cut the ring from the bottom, the sap flow is interrupted to the top hereafter chop is also no longer a problem.
After slicing onions or garlic fish (so strong odors) Everything rub with half a lemon so the blades, hands, cutting board.