What I usually do in fall/winter is put a layer of cardboard over garden soil, water then pile on leaves, water, then newspaper, water, chicken manure, water, newspaper, leaves, water, coffee grounds, newspapers topped by old garden soil from pots. It's called lasagna gardening because of the layers. But this fall too busy so I just threw on chicken manure and leaves in spring, it's looking great. No tilling or turning. Fluffy soil. Happy veggies.