Become debt free sooner
Snowballing is all about paying your debts in the correct order. Generally speaking you should attempt to pay off the debts with the highest interest rate first. Some people, such as Dave Ramsey suggest you pay the card with the smallest balance first, that's fine, and can help you feel you're getting rid of the debt quicker, but it's not the most efficient way. This calculator allows you to enter up to 20 different debts with their associated APRs, and the total amount you want to spend per month servicing your debts, and it'll work out the order in which you should pay them together with the monthly payments. For more information on snowballing follow the Motley Fool link to the right of this page.
If you're considering a consolidation loan, think carefully about it. It's almost always cheaper to snowball your debts, and often people who consolidate their debts end up in more debt because they haven't addressed the main issue: They spend too much.