Basic things like getting up every day and being at work at a consistent time. 5 days a week.
You mean like holiday?
My dad had the same idea, so after I finished high school he took me with him to work for the summer, at an auto repair shop. Because up until then, getting to school at 7AM every day, spending 6-7 hours in class, spending another 3-4 hours doing homework, and another 2-3 hours preparing for the graduation exam and working on the accreditation project and working on my own stuff while managing to not have a nervous breakdown was a piece of cake in his view. I did gain something from the time spent in the auto shop, partial loss of hearing and no time to work on the things I wanted before starting college.
School thought me a very strict working schedule, one that I was surprised that no one respected in college. I was literally, the only student in math class to actually attend the first two hours of the course in the morning. During that time, I got a job in an insurance company, but I had the nasty habit of keeping regular work hours, meaning I had to stand around outside, waiting for someone with the key to the office to come along and let me in. Once I actually had to go looking for the keys around town, because the manager lost them on a bus. There was also the fun part of some time sensitive papers that were legally fudged because when I got back from signing them, the office was closed, everyone having gone home after lunch on a Friday. I quit that job after a month.
Then I got a job that was basically hell in regards of working hours, or so I've been told. I didn't start to notice what people meant until I got physically ill. I didn't stop, I just shrugged it off as a silly human reactions that needed to be removed , until I realized my work wasn't being used at it's full potential and that for the past few years I had no social life whatsoever, just a downward spiraling pit of depression.
Things are better now. My point is, someone who didn't have a job in high school or college may not be completely unequipped for the workforce. They may actually have the mental stability which I now sort of lack, because of my work ethic. The kind of mental stability that doesn't require starting off the day with 5 minutes of the Swedish Chef, in order to trigger humor, as to remind me I'm still human.