This is a recent job.  Below are screen caps of the quick idea sketch in Photoshop followed by a progress shot and a final.  I started to draw the girl with her hands up on her head.  I realized that I’d need to change the face to look more angry/frustrated and less tired, but I liked the tired expression more, so I changed her posture to match her face.  Not the most direct route, but I think it turned out okay.