Add storm windows to your home. These windows will reduce the condensation you see on the windows.
Increase ventilation in your home. Vent things like clothes dryers outside, and open windows and doors if possible after creating moisture, such as after showering or cooking.
Get rid of high humidity levels near windows by running a dehumidifier.
Reduce moisture in your home by running exhaust fans and limiting things like taking long showers, using the clothes dryer or wet mopping the floor.
Open your fireplace damper to allow moisture to escape outside. Keep firewood outside at all times. It attracts large amounts of moisture and adds to condensation issues.