Inspect plants before bringing them indoors. If they show signs of pests or disease, cure the problem before you infect your other indoor plants.
Avoid placing plants in trouble spots, such as near heat or air conditioning ducts, on television or a radiator or between curtains and a frosty window.
Provide the right light. Plants that require full sun will thrive in a south-facing window. East-and west-facing windows have moderate sun. North windows have very little sun.
Remember that air conditions can be very dry in the winter because of heated air. You can provide a little extra humidity with a pebble tray and some misting.
Always plant in sterile soil. That will minimize problems with fungus gnats and other soil-borne diseases.
