Cut the spent, withered flower from the stem, at least halfway down the stem. Only use clean, sharp clippers to make a straight cut.
Dip the cut stem into cinnamon powder to seal the stem and limit infection.
Move the potted orchid to a cooler, darker location for about two weeks. You'll need the temperature to drop by 10 to 15 degrees Fahrenheit.
Keep the relative humidity around the plant at about 60 percent, but don't water it for the two weeks. Mist the air near the plant, place it in a steamy bathroom, or position the plant near a bowl of water or other damp plants to increase humidity.
Position the plant in a warm location near a south-facing window and water it heavily to jump start the plant growth.
Water the plant only when the center part of the soil is dry about 1 inch down. Orchids prefer dry soil between waterings.
Apply fertilizer according to the specific needs or your orchid. For example, cattleya orchids need a liquid 25:9:9 fertilizer applied with water once a month.
Care for the orchid as normal, and it should re-bloom in about three to four months.