Lisa,
Snowballing is when you set yourself up to pay the minimum payment on all your debts, then you look at what you have left over. You take what you can afford after utilities, food, rent, etc and apply it to one of your debts (there's some debate about whether you should apply it to the smallest debt, or the one with the highest interest, I go with smallest because it gives you some satisfaction to see things getting paid off). Once you have paid off a debt, you take the money you were sending to them (both the minimum payment and the extra) and apply it to the next one in line. Once that is paid off, take the money that was applied there, and apply it to the next one. As you do this, the amount of money you can apply each month "snowballs" it gets bigger each time you pay one off, so that by the time you're done, you should be able to pay off the last one in record time.
For example...
Credit card 1= $1000 balance $10 mo minimum payment
Credit card 2= $2000 balance $20 mo minimum payment
Credit card 3= $3000 balance $30 mo minimum payment
Rent=$500 per month
Utilities= $200 per month
Transportation =$100 per month.
Monthly salary = $1800
Pay your expenses=$800
Pay minimum balances=$60
Save a bit for emergencies =$200
Money left over =$740
Apply $740 toward credit card 1 in addition to the $10 payment. Totals $750 toward $1000
Next month
Credit card 1= $250 balance $10 mo minimum payment
Credit card 2= $2000 balance $20 mo minimum payment
Credit card 3= $3000 balance $30 mo minimum payment
Rent=$500 per month
Utilities= $200 per month
Transportation =$100 per month.
Monthly salary = $1800
Pay your expenses=$800
Pay minimum balances=$60
Save a bit for emergencies =$200
Money left over =$740
Apply $250 to credit card 1 finish that balance.
Apply $490 plus 20 to credit card 2
Next month
Credit card 2= $1490 balance $20 mo minimum payment
Credit card 3= $3000 balance $30 mo minimum payment
Rent=$500 per month
Utilities= $200 per month
Transportation =$100 per month.
Monthly salary = $1800
Pay your expenses=$800
Pay minimum balances=$50
Save a bit for emergencies =$200
Money left over =$750
Apply $750 plus the $20 minimum payment=$770
Next month
Credit card 2= $720 balance $20 mo minimum payment
Credit card 3= $3000 balance $30 mo minimum payment
Rent=$500 per month
Utilities= $200 per month
Transportation =$100 per month.
Monthly salary = $1800
Pay your expenses=$800
Pay minimum balances=$60
Save a bit for emergencies =$200
Money left over =$740
And so forth.