Returning to the San Diego Convention Center and Marriott Marina January 8-11, the San Diego Boat Show takes on an eco-friendly focus. As more boaters reduce cruising speed, tune their engines, and take shorter trips, manufacturers are working to develop cleaner, more efficient engines. Those looking to purchase a new boat or upgrade the one they own can find once-in-a-lifetime opportunities offered as a result of the current economy. Bring the whole family for a fun-filled day complete with boating seminars, a wakeboarding stunt show, and a kids’ area. (858/274-9924, www.sandiegoboatshow.com)   RINA VAN ORDEN