On this list, every week there are lots of useful posts. Not positive about this, but I seem to remember reading that adding lecithin helps keep bread moist. More sugar Mix the dry ingredients. Cut in the butter. Add the liquid to make a soft dough.
Sprinkle tops heavily with sugar.
The procedure is to make a starter three days ahead by mixing one cup of whole wheat flour, one cup of warm water, one tablespoon of powdered milk, and one packet of yeast. This is allowed to sit, covered in a warm place for 24 hours. Then two cups of warm water and three cups of regular or bread flour are mixed in and this is allowed to sit for 24 hours. The final day you add the final flour and salt to make the bread. I would think this approach could work for a lot of bread making to make it more in the sourdough style.