November is the start of the winter season and time to put the garden to bed.
Cut back, chop up, haul off and in general clean up any perennials or annuals that are yellow and frost-bitten. This is a good time to start a compost pile in a hidden corner of the landscape. Just layer brown material (brown leaves, bark chips, soil) with green material (grass clippings, green leaves, green weeds) and let it all rot.
You can hurry the decomposing by chopping the material into small pieces, covering the pile to keep it warm, and adding air to the process either by turning the contents or giving it all a good poke with a sharp stick. Some gardeners crank up the heat of their compost pile by using hollow metal pipes stuck into the center of the pile to add air. Every few weeks they wiggle the pipes or remove and then poke them back into the pile in a different spot. Anytime you add a channel of air to your compost pile it helps to turn the garden garbage into garden gold.
If you have a weed problem in your vegetable bed, though, fall is the time to pull and remove those summer weeds, roots and all.