On eGullet, there was a Q&A session with Heston Blumenthal, and someone asked him about how to do roasted potatoes. His answer was encouraging and downright enlightening, in that it was quite simple (great recipes aren't always complex). Still, it was quite discouraging — yet far more enlightening, to see the problems I had trying to follow the recipe (for an amateur to try follow the instructions of a great master is tricky, because the masters have so much knowledge that they take things for granted). But the most encouraging, and enlightening thing is that I think I've figured it out.
My method is different, and far cruder than Blumenthal's, which involves garlic and fine herbs, some added halfway through the cooking process. I just went with salt and cayenne pepper for flavorings.
Finally, crispy on the outside, and soft inside. Yeah.