Here are some tips for dealing with onions:
- Before slicing, place onion in freezer for 10-15 minutes, or soak in a ice water bath. or…
- After peeling, rinse onion in cool water.
- Cut out, in a cone shape, the core, where the root comes out, this is the where the gland/source of the sulphuric compound is.
- Use a sharp knife, crushing the flesh creates more fumes.
- Work in a well ventilated area.
If the onions have got you crying, go into the walk-in cooler for a minute or so, if possible, or maybe even stick your head in the freezer. *ha* Otherwise, you can wash your hands very well, and then splash cold water into your eyes.
If you can’t stop crying, perhaps a hug from a friend will help 
Removing the smell of the onions from your hands can be helped by rubbing them on something stainless steel.
Here is a video I made, demonstrating how to do a quick dice on an onion.
