That's the question. I've been to color theory classes, I've listened to the lectures, taken notes and understood visually what the teacher was trying to convey about using cool blues and purples to shadows to create depth and form.
Until recently though I really hadn't started to applying it to my work. I'm not sure what the hesitancy was about. Perhaps its the skill required with watercolor to soften the edges as you layer? Maybe its the fact that one has to be patient and wait for one layer to dry before dropping on another. At any rate, I've been excited with the steps I've made in watercolor color theory, but I'd love to hear some of your tricks.