Page 30 and 31 of The Creative License talks about drawing what you see. You're supposed to get a bagel (toast if you don't have a bagel) and map out the surface of what you see. I have to admit, it took a long time to get even what I did get on paper. I was a bit frustrated that I wasn't able to put on paper what I was seeing with my eyes. I kept at it though and some of the parts came out okay. Not sure if I'll revisit the drawing but I know I need to practice this some more.