Quitting a job isn't something we do on a lark. Financial considerations, career concerns, and a dearth of available alternatives keep many people at their current place of work even when they might prefer to be elsewhere. However, paying attention to sometimes subtle signs that you are done here may help you plan for a better future and save your sanity. Listen to your gut.
Here's another reason to learn some new stress management techniques: job burnout, and the stress that goes along with it, might be less healthful than tobacco use, overeating, or living a sedentary lifestyle.