I'm posting this link for my students. It goes to a wonderful demo by Jeff Hayes. Jeff's step by step photos beautifully illustrate the process of using just a closed grisaille to first establish your values and separate the issue of color. There are *many* ways to accomplish your goals of painting a given subject but I've seen that this one, while relaxing (becuase it leverages your drawing skills) and fun can be hard to describe in words.
Have a great week and I look forward to seeing you and hearing your responses in our next class or an upcoming workshop.