Sanitation is a very important component in successful gardening. Keep it clean and it'll tend to stay clean throughout the following year. Tomato vines and other plant parts free of diseases and insects can be buried or placed on the compost pile. Plant material infested with diseases like verticillium and fusarium should be removed from the property and destroyed since these diseases will carry over to next year in the compost and soil. Rake the garden clean, turn it over, and sow a cover crop to hold the soil during winter months and add valuable organic matter when turned under in the spring.
Recent research suggests that plowing on a dark night decreases the germination of some weed seeds.
This might be useful in the spring plowing, but for the fall you'll want weed seeds to germinate in the hopes that the young plants will winterkill. Clean the dried soil from hoes, spades, forks, and rakes with a wire brush and rag. Sharpen hoes, spades, shears, etc. with a flat mill file and stone. Don't use a bench grinder because it's too easy to ruin the temper of the steel. File the edge of hoe blades at a sharp angle.