Finally got back to life drawing, it feels awesome! The exercises consisted of 2 extremes; 20 minutes of the model walking around at standard pace and rarely stopping and then about 2 hours of the same pose. I especially enjoyed the quick sketches, you reach a whole new level of concentration and anguish in those sort of exercises.
As for the 2 hour pose, I was focusing all of it on staying true to the figure, being really strict with measurements and all. Next time I'd hope to loosen up a little and try to show some character in the pose and model.