I get paid weekly on Thursdays so it comes out Fridays. Then each Weds night whatever I"ve got left I put in as a lump sum. Admittedly it's not always a lot as I'm slowly learning to cut spending.
Sounds like you have a good plan.
Don't beat yourself up too much, that 15% debt might be the best thing that ever happened to you. So many people steam through life with moderate debt, limited savings, and never realize they are just floating by when they could be soaring. Sometimes people look back and realize that thing that seemed so horrible at the time was exactly what they needed to open their eyes and help them find a better plan. Sure, that 15% on $6,600 sounds like a lot, but I lost $300,000 on a stupid house purchase before I woke up. Be glad you are on the right track and make sure you follow whatever track will take you where you want to go in the future. :)
The 0% credit card isn't a horrible idea, but it does carry some major risk of taking the edge off your desire to pay off the debt. Only you can know your level of discipline and what it takes to keep you motivated. Over the next few months the interest rate isn't your biggest enemy, it's that balance. Maybe you can save $100 in total, or even $200 using a no interest credit card, but if it affects you even slightly to spend more, you could burn through that savings really quick. I would get the cc sometime later, when you know you will pay it off every month and only use it the right way.
Regarding meals, don't forget to pick up some fresh veggies on sale. Your health is important enough that a few bucks on quality food is worth it long term. Also things like homemade rice and beans is a lot healthier than canned soup, and cheaper as well. :)