I had the impression in P4 that my workload had gone lighter and lighter. I now think that I have just become much more efficient at MBA-type work. I know where to look for the useful tidbit of inforation in a 15-page long case, I know what matters and what does not in a group meeting, I know my classmates and can work better with them - above all, I am clear about my priority. If you are clear about what your objective is, you know when to say stop.