I usually just chop & drop the spent plants, put some rabbit manure on the surface and cover with a layer of
wood chips. I did have some beans get mosiac last spring, so I disposed of them outside the garden.
I live in Texas, so usually just put the garden down for a "nap" over winter instead of putting it "to bed," since it's mild
enough to grow kale, chard, peas, turnips, and other cold-tolerant vegetables over the winter. I like to space them out around the annual veggie garden and
mulch the unused space with 8+ inches of shredded leaves/wood chips to break down over winter.
The only real pest problem I had this year was squash bugs and aphids. Hopefully next year I'll get more predators to help control them.