When out on location I have been challenging myself to push the color temperature. The bottom painting is the "actual color"this morning. On top you see how I took the scene and gave it a strong warm bias.
Keep in mind that while painting you are like a chef, constantly measuring the amount of spice you need in your dish. When making tomato sauce I taste- do I need more onion, garlic, basil? When painting you look and think, is it warmer or cooler (darker or lighter)? Keeping a painting in a temperature range gives it a mood. Similarly, cooking a sauce with the right amount of spice gives it a smooth flavor.