Glad you like the article!
I don't really do figure drawing, but when I do I start out measuring things very carefully but after a while it becomes more and more intuitive. For really important things (like for a client rather than a sketchbook-type thing) it's pretty standard to make a few practice sketches and then be very careful in keeping things "right" by actually measuring with a ruler, etc. if necessary. But the idea is to get to the point where all the rules are just natural to you.