I hate to be a thorn in this thread since it's so well developed, but do you have a written, monthly budget? Ideally, you know every penny you're earn and every penny your going to spend before the month even starts (not including real, actual emergencies, example: new tires/brakes are not an emergency). You need to have a real budget before you start the snowball so you know exactly how much you can put toward your debt. (and so you have a much better chance of finishing the plan).
Once you have a budget... HECK YES, snowball it!
If you haven't read it yet, a lot of people in this thread are referring to the book Total Money Makeover by Dave Ramsey, might be worth spending the $10-$20 on.
I am not an attorney and none of what I write should be construed as legal advice. For legal advice please consult an attorney. Starting Score: ~470 preBK(8/2010) Current Scores as of Late January 2016 All 700+. Last CR pull from a lender(housing) was mid-score 749. Goal Score: 700+ - reached.