Please continue adding color/texture/value/etc. to your self portrait from last week.
If you have "finished" this somehow, what else can you add to the composition? A random bird or wooden sign? An armadillo?
Can you get more ink in it? I mean, it's hard to have too much stipple. When was the last time you did a great stipple drawing anyway?
Make it more complete and more interesting please.
This is just another example/exercise of being able to make something interesting with but short bursts of time that ultimately add up to make something better and more interesting.
Note: Thursday will be a day for you to get some study drawing time in, so come ready to work on a new idea!