User Physics and the Quest for Perfect Software

This post was inspired by the words of Bob Schukai (Twitter @iammobilebob) when I attended the AppsWorld event in Earls Court, 2012 and he spoke of measuring your Users actions to determine the hot and cold spots of your software (among other things - I had hoped to share in greater detail my thoughts on his session but alas the audio recordings never seemed to materialise from the event organizers).
It's been a little while since then (though it may be longer still before I publish this.. who knows how long it will take to write) but I still keep finding myself considering what was said both when using and writing software.