Start putting out bird feeders.

Create a brush pile to provide shelter for birds
over the winter.

Take down nesting boxes and clean them with a stiff
brush and boiling water (wear a mask) and make any needed repairs.

Now is a good time to pest proof your house.
Once you ensure all intruders are gone, seal all entry
points to your attic or chimney.

Clean out and repair bat boxes.

Set out traps for slugs - they breed in the fall.

Leaves raked off lawns can be composted in a
temporary wire enclosure if they overflow your compost bin.
Leaves left on lawns cause damage to the lawn, but leaves spread in a carpet under trees and shrubs form a fine protective mulch. Water it down a bit to help it stay in place. This can be a permanent mulch and a fine place to grow wildflowers.

On a warm day, drain and smoothly coil your hoses and
bring them inside.

Coniferous trees, such as pine, cedar, and spruce are best planted in the early fall (when the leaves start to change colour) or late spring once the soil warms.

Plant perennials in sparse areas, transplant those that
are looking unhappy, or divide crowded perennials such
as black-eyed Susan, cardinal flower, evening primrose
or coreopsis.

Most pruning is best done in the spring in Canada,
but storm damage and dead branches may be removed at any time. DO NOT use pruning paints as modern research shows these often cause more harm.

Move potted plants indoors or bury them in the garden soil.

Divide and transplant iris, lily, Shasta daisy.