Time to get your home ready for changing weather. My recommended essentials:
Book an appointment to have your sprinkler system winterized ASAP. If this tasks gets away from you and you're worried about a freeze, check out this Organo-Lawn video on steps you can take to protect pipes.
Have your gutters cleaned.
Get your furnace serviced.
Disconnect hoses and turn off outdoor water (if hose bibs are not frost-free).
Seal cracks around doors and windows.
Replace smoke and carbon monoxide detector batteries.
Have your chimney cleaned and check that the damper is working.