For me with my DBP Amarok, it's all about the initial preparation and protection, followed by minimal contact.
I had it pro-detailled when I first got it as much as I would have loved to have spent the time doing it myself, it was so much cheaper than me spending twice as long and not earning. Since then it has has pretty much the same pre wash and hand washing procedure as others have mentioned. I also take the minimal contact theory one stage further by putting up with the dirt for longer. If I don't have the time to wash it properly (2 hours min) it won't get done. There should be no such thing as just a quick wash.