Tips on Upper Body:
1) Try connecting the breast balls to the shoulder balls.
2) The arms are in the shapes of rounded triangles. Arms usually end at the mid thigh.
3) NEVER stress over skething the anatomy. As you see with my speedpaint, my final drawing certainly doesn't always PERFECTLY match up with the sketch.
4) The waist is basically two triangles overlapping.
5) Shoulders aren't always rounded, and the breasts should drop/sag as it looks natural and not stressed.