My sleep schedule has been fucked for the last 9 years, due to my jobs.
I worked 3rd shift(10pm-6am) 2 days a week, and random shifts the other 3 days at my last job. Mostly 6am-2pm or 11am-7pm shifts (It was McDonalds, so there wasn't just 3 shifts)
I've worked random shifts at my current job for a while, mostly 2pm-11pm or or 3:30pm to 12:30am. I got "nominated" to work 3rd shift this year... again. I know tomorrow I work til 12:30am and have to be back at 9am the next day.
I drink waaaaaaaaaaaaaaaaaaaaaaay too much soda (4-6 cans a day, more in the summer), I've tried cutting back, but I can't stand the taste of most non-soda drinks, at least not enough to replace them for a day or two, or to switch between.
I don't drink alcohol often, but when I do, I usually drink too much.
As for non health related habits, I am way too friendly with my female coworkers. Which is doubly bad at work, since I am also their boss. Nothing too serious, but I treat them more like my friends than my subordinates, which REALLY pisses off my management. I've been called in the office... 4 times in the last year because they thought I was dating co-workers(which as a manager is a red flag). The one time they were right was because she was very... open about it, plus she wasn't in my department, so I wasn't breaking policy.