As an industrial design student, you are required to do roughly eighty ga-million sketches over the course of 4-5 years. The prompts for those sketches vary widely; sometimes they're extremely specific and sometimes they're as vague as 'do ten pages of sketches.' So it's inevitable that every student (and professional designer, for that matter) will get to a point when they just don't know what to sketch next.
Over the years I've come up with a few ways to keep sketching, even when you're feeling supremely stuck. Fittingly, I put those tips together in a sketch in preparation for the evening class I'm teaching this semester. Do you have any tips for getting un-stuck?