That's a difficult angle. I generally work it out first by clearly setting up the basic shape and the cross-guide for the features, making sure that I'm following the curve of the face around (note that it gets more extreme the more they're looking up), and then putting the details in, but not over-delineating the jawline. In fact, sometimes from that angle I don't draw the jawline at all, and instead use a little light hatching to help separate the planes.
And dammit... I can't find a good example in my gallery. If nothing else, show us what you've got so far and maybe we can walk through it.