A fantastic way to save money for those of you with kids is cloth diapering. While you are probably thinking this would be the equivalent of trading in your car for a horse and buggy, let me say that cloth diapers have changed A LOT since I used to wear them. Not only are they a LOT more convenient now than ever before, the health benefits are better, they are much cheaper over the course of your child's diapering years, and they are better for the environment.
I highly recommend checking out this site - http://www.bouncingbabies.ca - they have great info for you if you are new to cloth diapering or if you are considering a switch and just want to learn more about it. And when you do decide you're ready, they have a great selection of products to get you started!