Some members here helped me out a few months back, with this topic, so I want to report back.

Starting this school year, I have switched the majority of my customers to 'AutoPay', where I bill their credit card each month. I tried 'jackrabbit' software, it didn't work for me, then I found Chase Merchant / Paymentech, which is working great.

I am so pleased with this method of billing. Last couple of years I was having more and more problems with late payments, and this is such a good way to prevent that. I know there are other good methods, but just wanted to let you know how happy I am with this solution!