How do you work full-time and stay awake all shift?

A few questions to people who have struggled long-term with fatigue, exhaustion, insomnia, etc.: what do you do to keep awake for a full-time workday? Black coffee, supplements, herbs, drugs/prescriptions, other? None, and it required a lifecycle habit change? Have you had success with "desk" jobs sitting all day, or had to choose a field with physical activity to keep from falling asleep on the job? Does it just "get easier" to wake up and stay up after multiple years of full-time? Before starting full-time I had only been able to get part-time gigs before, but it hasn't taken long for me to notice my biological clock isn't set right and every day I'm not sure if I'm "built" for it. Is anyone? Thanks Lemmy!