Don't forget to water.

It seems when it gets cold and folks stay indoors, they often forget about the plants that are stuck in the ground w/o rain or water. Even if the tops are fading, the roots are still growing and they are the part afterall that need the water! Watering should continue until the ground stays frozen, like late November if rainfall is not adequate. Obviously not as much watering as hot sunny days call for, but do not let them completely dry out. Mums are shallow rooted plants, that need more water than most fall plants. Evergreens especially need water going into winter.
Their needles (their leaves) transpire (breath) all winter. The evergreen trees & shrubs will have a lot less browning on their leaves if they are full hydrated going into winter. There are some sprays for evergreens, but I have heard they are not effective. Adequate water this time of year is about 1/2 - 1 inch per week.