Whoa whoa hang on, simple and correct does not mean fast. Take your time in the construction stages, make extra super sure everything is right. You may not be making many lines, but that doesn't mean you should think or take less time than if you were using tons of lines and detail. simple or economic =/= easy or fast. Here's a link I guess.a few selfportraits, i tried to do them really fast just to get the main things down fast and simple, i think they came out too cartonish
I'm always drawing too fast so maybe I'm the wrong person to tell you this, but be patient with your drawings. Quality over quantity. Just make sure you have a whole ton of quantity to put the quality over and you'll improve quick.