From day to day there will be variation in subject matter, medium, detail, and style — often it may be a quickly sketched face. The common thread is face and repetition. Check www.hewfly.com/faces every day for a new sketch!
An exercise in drawing faces, capturing proportions and likeness quickly. Not perfect, just practice! 15-40 minutes keeps things brief and to the point with basics. This forces me to see and draw more instantaneously rather than spending a lot of dilly dally redrawing and erasing frequently. Through practice I should get better at judiciously laying down the correct line the first time.