2. Use a sharp knife.
3. Chop the onion underwater.
4. Use frozen diced onions.
5. Place the onion in the freezer for 20 minutes before cutting.
6. Cut in a well ventilated place and cut fast.
7. Cut Onions near an open flame.
8. Wash your hands as soon as you’ve finished cutting onions.
9. Put some white vinegar on the chopping board before you start cutting.
10. Cut the root out and throw it away.