So this month is when you should start a weekly routine of pulling out any leaves, stems and other debris that doesn't belong in your pond.
Cut back any withering marginal plants, and take the opportunity to thin them out a little as you go.
Start to cut down on the amount of food you feed your fish, as uneaten food will only gather on the pond bed and rot. Just scatter a few pellets of flakes and supply more only if the initial food is eaten.
By the end of this month you should remove and clean any submersible pumps.
If you have any non-hardy aquatics such as water lettuce and water hyacinth and you plan to over-winter indoors, now is probably your last chance to remove them.
If herons are a nuisance and you don't have a net fitted, it is a good idea to put a few 4 inch drainpipes on the pond bottom to serve as a hideaway for fish.
Finally give your pond a thorough checking over. Check the liner (or concrete) above the waterline for any cracks or leaks. Fix any problems now before the frosts have a chance to make the situation worse.
Take a well earned break, you'll have plenty to do next year.