I try and pull my sketchbook out every chance I get. Whether it is to create a background for later use or to create a study or painting from the pages that are "in waiting". Using my sketchbooks regularly gives me the opportunity to intuitively paint. I grab whatever I have at hand and just let myself go. Because I work in a lot of portraits I find that these images just appear, others may find that this happens when they work with animals or landscapes or even abstract arts.