Squeeze out as much water from the couch cushion as possible manually. Take care not to tear the foam as you wring. Press towels against the cushion to absorb excess moisture.
Pinch two corners with the clothes pins and hang the couch cushion from a clothes line to dry. If hanging the cushion from a clothes line is not an option, set the cushion horizontally onto a drying rack and allow it to dry. Use the sun to help the drying process along, if possible.
Set the cushion on one end and direct an electric fan onto the front or back of the cushion. Rotate the cushion around to the other side every hour to hasten the drying time.