Just take it one debt at a time. Don't worry about your FICO score yet. Your priority should be getting out of debt first. Then tackle your credit score.
I would use the snowball effect when tackling more than one debt. Now since these are charged off and are more than likely sent to a collections Agency this will be a little more difficult since all of them are going to want to be first in line to get their money.
First due a budget. Remember your rent/mortgage, utilites, car payments, groceries come first. Work out your monthly budget from that. ( you may have to scale back some things, like down grading your cable or getting rid of it all together, having only one phone etc.) See what you have left over. Don't call any of the creditor's until you do this first, you have to know how much you can work with and not eat ramon noodles for the next year.
When you call them make sure you have something to give them that day, anything to show a sign of good faith. Most are going to want 20% down on the balance due to set up a payment plan, you can, as I have even negiotated that to be paid off in a couple of installments. ( example, Creditor wanted $500 down to set up a payment plan, i paid that in two installments of $250) Once you get into a payment plan start paying that religiously. Once the first one is paid off, take the money you have been spending on the first card and add that to the amount you are going to pay on your second card and so forth and so forth.
Don't worry about your FICO score until the debt is under control, then go and work on it. Also I used Dave Ramsey's Total Money Makeover Book. He has some off the wall ways about him but in terms of getting out of debt, he is on the money, cost something like $25 but it is well worth it.
