What is on my easel today (and yes, it is Thursday):
Working on a commission....I use a monochromatic underpainting for much of my work, especially if it is large or complex. I also like to use it for many of my commissions - lets me give the customer a "preview" white it is still easy to make changes. I use the underpainting to check values and composition - and I feel like I can still easily make changes as needed a little more freely.
From this point, I start to add layers of color to the painting. I always find it exciting to watch it "come alive".