Composting is an excellent way to reduce waste and improve your gardening. You don't have to get too fancy. Via Make I have found how to make a compost bin out of used pallets and how to make your own indoor worm compost system.
There are plenty of resources about composting out there. I don't really do anything technical. I just toss stuff in my bin, turn it once in a while and add water if needed. It has made a difference in my garden and yard over the years.