Having spent pretty much all day alternately typing and playing the piano, I really needed to do something that didn't involve fingers and keys before bed.
Here's the result, a 1.5 hour sketch of actress Annette Andre, from a screenshot from "The Saint Steps In", from season two of The Saint.
It's not perfect, by any means, but it does look like her, so it's not a failure either. I usually grid-to-enlarge my proper portraits (and spend a huge amount of time on them to boot) so I can get some wonky results when just sketching. =P
1.5 hours in a Jasart 'My Memoirs' sketchbook, with a 0.5 mechanical pencil, #B lead.