I drink two cups of black tea in the morning, and sometimes also a soda if I really need to be productive. My sleep schedule is pretty abysmal: 5.5-6 hours on w

I drink two cups of black tea in the morning, and sometimes also a soda if I really need to be productive. My sleep schedule is pretty abysmal: 5.5-6 hours on weekdays, 9 ish on weekends. Nonetheless, I seem to be able to focus for at least 10 hours per day of good work. The other two of my twelve daily hours at work tend to be pretty low quality. It used to be that I'd be a useless blob when I got home. I seem to have mostly fixed that by standing for 5-8 hours each day at work. Only downside is I've become acutely aware of how uncomfortable some of my shoes are.