I have rented Bridgman books from the library, obtained ebooks and really tried to utilize the books. I read the text and tried to understand what he was trying to convey. I copied the images he provided (and some were so complex I wasn't sure WHAT I was drawing and what importance each line had). Application of the text and images provided were also used during my gestures and life studies. I simply didn't see what I needed or how Bridgman would see the figures.
I also tried using Loomis' books. I did not get through them all,, but like Bridgman, lots of copying then attempting the application. I get to the figure and simply derp.
Many people tell me "JUST DRAW!", but if I am not practicing correctly, I am not learning. I learned that I must be analytical and critical during drawing, unlike Betty Edwards' method of unlocking a mythical higher state of power.
Am I rushing too quickly though the books? I do studies very often (and not enough original work), but I never feel like I am getting much out of these well-known books.