When you dig the tubers, save all the little pieces that aren't big enough to eat. Dry and cure your tubers and the put the little tubers in a paper bag and store in an out of the way place where it will stay cool and dark. Next spring those pieces will become your very own planting stock.
Also with the cool weather be prepared to cover your remaining tender crops left from the summer. I'll protect the last of the peppers, eggplants and beans. When it gets cool my garden looks like a JC Penny white sale. Use old sheets and blankets, these will breathe and won't have to be removed early in the morning when the sun comes up. Plastic is not good for this project, plastic is not a good insulator and will have to be removed before the sun scalds the plants under plastic.
Possibility of a frost tonight here on the farm so I covered the last bean crop that is blooming and has tiny beans trying to make a crop. I'm taking a chance with the peppers and eggplants, a lite frost will only burn a few of the top leaves.