I've shared this with a number of people now and it works. It even works if you don't pull the weeds out first. But then we have a short creeping weed, so I don't know what it would do if it were tall.
Here's another link for “7 Deadly Homemade Weed Killers”:
I'm not too fond of the bleach idea since we have birds and critters wandering around our grass.