Use your mower with the bag attached to shred and collect fall leaves. Fall leaves are also a great resource for those of you minimizing soil disruption with no till, also known as no dig, soil care. Cover bare soil in perennial gardens and mixed borders with fall leaves. Convert landscape and garden trimmings, fall leaves and compost into a rich planting medium with lasagna gardening. Start your lasagna garden by measuring and marking the layout of your garden bed.