The first lesson is not to teach five courses on top of writing books, journal articles and encyclopedia articles. This is not to mention other types of work. Next semester I am only teaching three courses. Then I will not have to work seventy hours a week.
The second lesson is to not teach any more eight am courses. It is still dark in Bishkek at that time in the morning and there is no lighting on the street at seven am. I have already witnessed one pedestrian killed by a bus during my morning walk to work this academic year. I do not intend to share his fate.