Hi Punchinella,
your question inspired me to rethink aspects of how to draw...well, basic truth about drawing is that you must not be concerned about 'what' you draw because no object, concrete or imaginary could be captured unless you enter the spirit of it and completely try to be it, in other terms you do not treat objects but you are becoming a 'subject' of what you draw, paint or play.
This is a basic principle. We are not trying to capture objects, but our perception of them, therefore, we try to express it. We try to express our reaction.
One of the methods to achieve this is to capture a general mood. Some of the best portraits I have done were people I felt the most. Some of best nudes I make were about how I felt (body language).
So get in the mood, pick the easiest media you can think of (pencil, chalk or even collage or wathever) try to express it through your facial expression or body movement, even try to dress like that, and draw freely and carelesly as much as you can. And oh, btw...use as much version, on as much paper as it take, do not get concerned with what final outcome will be.