Quote - . . . in fact, I'd strongly recommend that book (Drawing on the Right Side of the Brain) to anyone else who wants to learn how to draw, or draw better.  I don't want to be long winded but there is a genuinely startling exercise where you draw upside down and end up doing a better job!  It's fascinating stuff.  

It's an excellent book, and the upside down drawing exercise is amazing - drawing what your eye sees versus drawing what your brain assumes your eye probably saw. It really shows the way we tend to look at the world in our everyday lives - we don't really look, we just glance around and then fill in all the details using a library of stuff we already have in our heads. Cameras haven't helped, now we don't have to really look, even if it's something really significant, we just snap a photo and look at it later.