Thank you all for your comments! Do not hesitate to go to this site, they have amazing stuff, and they are both so nice and gifted!
I feel very proud of myself: within this year, beside this course, I've learnt how to keep a sketchbook with Sharon, and more important, I do use it :-), Those samples and some more are now in a sketchbook, and I'm going to write down my own comments on those pieces, for future use. This course was so rich that I really needed to make notes to go on with my experiments. And writing things before doing them do highlight possible problems and save time on the whole.
The weekend is nearly here, I'm going to get rid of a few UFO!