If you're looking for a sign, this is it. Is your boss treating you as if you're easily disposable, adding additional work duties that are not technically a part of your job description? Maybe it's time you look for a place where you'll be appreciated — where you won't be taken for granted, a place that will properly compensate you for the amount of work you do. In an earlier post, you'll find I wrote about a tired employee, working on an understaffed team at a restaurant, who shared his ‘horri…