Wall Street Journal:

The WSJ’s Scott McCartney went nonstop from Newark, N.J., to Singapore, testing his tips on how to survive more than 18 hours on a plane to help you with your next long-haul flight.

The only way to get me on this flight would be at gunpoint. No way would I ever take this trip in coach. Longest I can stand on a flight is about 8-9 hours before I start getting seriously owly. My trip last year from Vancouver, BC to Sydney, Australia with a stop in Hong Kong was pretty much my limit. Two 12 hour legs and I was not a happy camper at the end of it.