Joshearl, my chin is an absolute horror to shave too. I have a "butt-chin" and quite a few scar tissue mounds from splitting the darn thing in hockey and rugby. I have found that the best method, for me anyway, is to do very short strokes and constantly re-lather.

I know its probably overkill, but i end up re-lathering my chin 2-3 times AFTER my shave, just making quick passes to try and get it all. Hope my 2cents help!

(also note that I only have 30 posts, so there is a good chance I have no idea what im talking about... this could very well be extremely inefficient)