* If you haven't already moved your houseplants in, do it TODAY. Some plants can withstand a bit of cooler weather, but any day now, you will be disappointed, as those blackened leaves will not be revived.
* Give your plants a preventative spray against insects, before you bring them inside. An easy non toxic product to use is horticultural oil or an insecticidal soap. These will prevent any hitchhikers from coming inside and causing trouble.
* Back off on the watering. The days are getting shorter and your plants need to be watered less frequently. General rule thumb the top 2" soil should run dry before watering.