Time to get your furnace and chimney checked: don’t wait until the temperatures drop to find out if your heating source works!
Take a look at your windows: check for drafty windows and any areas that may need to be caulked.
Winterize pipes: find any pipes that are exposed or likely to freeze and cover them with pre-fitted insulation that is available at home improvement stores
Clean out your gutters: a gutter full of frozen leaves can lead to big problems, so make sure to keep them clean before the freezing temperatures arrive.
Fix a leaky roof: waiting until the winter to fix to fix your roof can be a costly mistake!