Nettle: Thanks man. As it is, I agree, it's pretty rough, but it was just a spontaneous idea. Maybe I'll polish it up digitally.
This afternoon I sat down somewhere in Utrecht Central Station and just sketched people passing by for about 1,5 hours. I'd never done this, but it turns out it is a perfect excercise in drawing FAST! It also greatly helps the hand-eye-coordination, as you simply don't have time to look at the paper while scribbling. Sometimes it gets all over the place, sometimes it works. This might just be something do to once every week, like half an hour or so. See if it will improve.
First two are not from the aforementioned session, btw.
Edit: Scanner decided to quit on me, but the rest wil follow shortly, I promise!