(materials front & back: patterned paper & diecuts: k& co; clipart bird: anahata katkin; journaling card & rub-ons: making memories; inks: colorbox; other: needlepoint yarn, manual typewriter; adhesives: uhu gluestick, tombow monoadhesive runner, 3m foam tape)
of course, to answer the question, i needed to approximate the conditions described (that is, being joyfully creative) so i decided to make a free-form collage using a bunch of random "inspiring things". while i was working, i thought about the question, and tried to decide what makes a "great art day" better than an ordinary one? and what exactly makes some completed projects feel more exciting or "successful" than others? then i wrote my answer on the back.
i'm not sure i've completely captured what i was trying to express, but this is by far the closest i've ever come, (having contemplated the topic off and on for the last few years) so i'm pretty pleased... for now. :)