One thing an exceptional employee never says is, 'That's not in my job description.' Exceptional employees work outside the boundaries of job descriptions.
We need to establish boundaries between our personal and professional lives. When we don't, our work, our health, and our personal lives suffer.
It's difficult to know when to set boundaries around your health at work because the decline is so gradual. Allowing stress to build up, losing sleep, and sitting all day without exercising all add up.