Painting in the field can be a daunting experience. I purposely made this experience easier by keeping my paint application thin and adding grayer pigments to my palette to allow me to control chroma. I use turpentine instead of mineral spirits to allow my thin darks to thicken on the canvas allowing me to over paint with light colors. I also push my values toward middle values, away from darker tones, remembering to paint from dark to light.