When I worked in IT we had a mantra: Don't be a superhero. This was at a massive company of 70k+ employees. Don't stay after hours to fix things. Don't take on

When I worked in IT we had a mantra: Don't be a superhero. This was at a massive company of 70k+ employees. Don't stay after hours to fix things. Don't take on more issues than you can handle. Don't agree to unforeseeable deadlines. Backlogs represent a staffing failure. Customers are waiting 2 days for an email response? That's a staffing failure. Working harder to cover up a backlog leads to staffing issues never being addressed, and only passes that burden on to the other IT staff.