How to get rid of that wretched weed?
I use non-selective herbicides such as Round-Up or Wipe-Out on the ones I've had in my yard. I haven't had any problem getting rid of it.
If you don't want to use herbicides, you can make a solution of vinegar, salt and water. I use Heinz Pickling vinegar which is more concentrated than regular vinegar and is readily available in grocery stores this time of year.