i will always remember my illustration lecturer at university telling us repeatedly that the best illustrators and comic book artists always had their sketchbook with them, and were always drawing. any spare moment was spent observing, sketching and perfecting their craft. that is of course completely true and a philosophy that certainly applies to any skill.
check out aschick’s work at her blog (why do people still use livejournal? baffles me). lovely stuff.
more at her flickr
alie packard’s shetchbook ffffound @ behance