Read a book and skip the course, this skill is something best learned by doing and repetition.
For that join a race crew. There pay attention, ask questions, and solicit the foredeck ape to mentor you. A dozen days where the spinnaker goes up and down several times a day, and you'll get it down. Look for a boat with the spinnaker setuppyou want to understand best - such as "symmetic spinnaker with dip pole gybes", or sail on different type boats and learn 'em all.
Last edited by sailingfool; 10-19-2006 at 04:00 PM.