According to CNBC your job as a librarian is one of the least stressful professions.
It's number "9" in the top ten.
"You're working in a comfortable environment. Your job is to help people use services as best as possible. Given that environment, stress levels are low. What's the most stressful thing a librarian faces? Teenagers with a paper due and you don't have the books. It's not really your stress," says Tony Lee, publisher of CareerCast.com.
Plus, there are mandatory "quiet" rules in libraries and you're surrounded by books. Books don't talk back or criticize the job you're doing!
Hat tip to Screwy Decimal for the lead.