23 credits

Did anyone take 23 credits this semester? Can you tell me your experience ? I took 20 this semester and I barely survived. However, I have a friend who had consistently took 23 credits during the last two semester and how did he do? I must say 3.94 GPA was not something thing to complain about. When I asked for his secret. He shockingly told me the way to success is to skip every class that possible. Yes, I was freeze but the his actual strategy is quite clever: skipping the class but not the materials. He studied by himself using the text books and came to the professor office for help if he stuck. It allowed him to remember the materials much longer than usual