re: Weeds have taken over my yard. I need help!!

I'm in the same boat. We had a bad fire ant problem thanks to our neighbors. They killed some of my yard and getting rid of them took care of most of the rest. Weeds took their place before we got grass growing and now we're left with a weed haven. I'm thinking about starting over, but if any of this stuff would work, I'd rather avoid killing everything. How would I know when it's time to give up on it?