Once you are making payments of any kind, even very small ones, remember to review your statements and ask or politely demand that any 'finance charges' or other fees be removed as well.
Sometimes these fees and other charges can be more than your regular payment. This happened to me and I was able to get these charges removed every time I called (3 or 4 times).
When you agree to a payment schedule be sure to get your interest rate stated clearly (always demand a low rate) and try to get language preventing additional fees as long as you are making a regular payment even if it is very small.