I have not even started the main course yet, only just finished reading the student guide and booklets, and have already benefited.
One of the course leaflets is about sketchbooks and learning logs. At first I thought maybe the sketchbooks didn't apply to photographers, and maybe for some it doesn't, but I do enjoy drawing as well (although I might not be very good) and so I thought it might be a good idea to have one.
I have already found that it will be really good for putting ideas down for future photographs. I sometimes have ideas about what might make interesting pictures but before now these might have just passed by and be forgotten, where as now I can jot down or sketch my idea for another time. See, I've learnt something already.