I heard once that biting down on a wooden pencil is supposed to help, though it never has for me. My mom says she has less difficulty when she's wearing her contact lenses. ...which also doesn't work for me. :-D Basically I'm left not using onions or chopping as quick as I can and praying I don't accidentally cut my finger in the process.

Also I realize that you're probably done cutting the onions by now, so this is all moot anyhoo. Heh.