Hmmm, let's see. I used to work 12 hr rotating shifts at a chemical plant's quality lab when I started, but luckily my school master allowed me to come in to any class I could make. Now-a-days, a regular work day, son's football practice after that, daughter's marching band on the other days, wife works weekends, my dojang is an hours drive away, yard work (big yard), yada, yada, yada. I am fortunate to have made it to my level by now. In as much, I can train on my own (at 6am), and still gain the majority of the benefits. I get to the dojang on Friday nights to learn new material, but right now I'm on the last of a three year wait before starting my two years of testing for 3rd degree. So, I just need to keep polishing what I know.