As noted, one of my favorite combinations for sketching on the spot is a dark wax-based colored pencil and watercolor. Sometimes an unusual color (rather than black, dark brown or dark gray) offers a livelier effect. In this case, I chose Indigo.
1⁄2" (1.25cm) flat brush, small bristle brush, assorted watercolor pigments, Indigo colored pencil, watercolor paper or journal
STEP ONE: Identify the Image
The trees beside our campsite at Fish Creek Pond caught my eye.
STEP TWO: Create a Sketch Plan
I used an Indigo wax-based colored pencil to lay in the underlying sketch.
STEP THREE: Apply a First Wash
I added the first light colors using waterbrushes and watercolors.
STEP FOUR: Apply a Second Wash
When the first washes are dry, I added stronger values and brighter colors.
STEP FIVE: Apply Final Touches
I used a small bristle brush and jabbing strokes to suggest the lacy pine tree overhanging the lake.