Cut brush back from the house
Before stowing all of your gardening equipment for the winter, walk around your house with a weed whacker and a pair of pruners and cut back any brush, weeds or branches that contact your house. This task will eliminate a common access point for insects, rodents and rot. It will also keep branches and shrubs from scraping away at your siding during windstorms.
Watch those leaves
If you don't want the tannin in fall leaves to leave hard-to-clean imprints on your deck and concrete walkways, keep those surfaces leaf-free. If you do get some leaf prints, try a solution of half water and half bleach (test it first in a hidden spot — it may lighten the wood on your deck)

Store outdoor furniture 
Scrub and store outdoor furniture; even furniture designed to stay out year-round will last longer if protected from extreme cold and wet. Store or cover your barbecue unless you cook with it all year. Clean and store your gardening tools, but don't put them completely out of reach — shovels are useful year-round.
Winterize external plumbing systems
This is the most important job of fall if you live in an area that freezes in the winter. The simple fact that water expands upon freezing has caused countless homeowners innumerable woes. Ignore this job and flooding, water damage and thousands of dollars worth of plumbing bills will be your constant winter companions.
Here's your to-do list:

  • Drain underground sprinklers
  • Outdoor pools drained
  • Drain exterior water pipes and pipes that run through unheated ares (such as garage, crawl space, or unheated porch).  If draining isn't possible the wrap with foam insulation or heat tape, 
  • Cover exposed spigots with foam covers. Or, if cosmetics and ease of removal don't matter, wrap spigots in layers of newspaper, cover the newspaper with a plastic bag, and seal the whole affair with duct tape.Drain and store garden hoses. Leave one hose and nozzle somewhere that's easily accessible; you'll need it for gutter cleaning and car washing.