21 signs you're about to be fired

Most people are at least somewhat surprised when they hear the words "you're fired." Some are even shocked.

But upon looking back on the situation, almost everyone realizes there were signs - they just chose to ignore them, says Robert Dilenschneider, author of "50 Plus!: Critical Career Decisions for the Rest of Your Life."

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," says the savviest professionals always keep an eye out for the classic signs that their job is in danger. This way, if and when they notice red flags popping up, they can attempt to turn the tides before it's too late.

Here are 21 signs you may be getting the boot: