When your trees' leaves have all fallen to the ground, it's customary to bag them up to be hauled away by your garbage man. But before you go there, consider mulching them to help enrich or insulate your soil. To turn them into mulch, all you have to do is run your lawn mower over them, which acts like a food processor! It helps to spread them out in long rows instead of one big clump. Then you can spread the chopped up decaying leaves around any plants, trees, or flower beds you have!