Sketch 5 different task-ware sites that you think are well designed. Pick 3 screens for each site that show one task from start to finish, and sketch those with enough detail that they would be recognizable to another person. Pick your strongest sketch-set. Why does this design work (focus on design, not on function). Include an image of the sketch sequence, and a screen shot and URL of the original.
Quick Draw really effectively transitions the user through the task steps. There is clear instruction and the concept matches the visual design so well. With the sketched icons and typeface style, it feels like you should add your scribbles to the screen.