9 signs someone is about to quit their job

Most bosses are caught off guard when facing a mass employee exodus, and the same can happen when just one valued employee resigns.

"As the boss, it's important to watch for the symptoms of an impending departure," says Lynn Taylor, a national workplace expert and the author of "Tame Your Terrible Office Tyrant: How to Manage Childish Boss Behavior and Thrive in Your Job." "Losing even one valued employee can disrupt your business, not to mention losing several team members. And if you're running a small company or startup, these losses can destroy your business."

Here are nine signs you should watch out for so you can act before it's too late: