My creative people: I can't recommend this enough. It's considered a primer on the creative process. And if you want to be fluent in your creativity, this book holds the key(s).
Since reading, I'm attempting to transition from an intuitive process to a more deliberate approach for conceptual pieces. It feels a bit like jumping off a cliff without knowing if I can stick the landing, but what am I if I am not challenging myself?
(The Creative Habit, by Twyla Tharp)