You haven't been given an opportunity to advance.

If your company consistently refuses to paint any career path for you and you're not happy, it's time to seek an environment that shows you what your career path should look like, Faust says.

If a raise or an opportunity to advance was promised and not delivered, your supervisor should be ready and able to answer why. If those answers never come, you need to start looking.

"You're seeing a pattern that is likely to continue repeating. While resumes look best when there are two or more years between changes, it doesn't hurt to look for opportunities that might provide a strong lead forward," Faust says.

Relationships with your supervisors -- or the company -- have changed.

For years you may have had a fabulous working and personal relationship with your boss, but if you've begun to sense a shift in the organization's culture and the boss' leadership, it could be a red flag, says Jayne Mattson, senior vice president of Keystone Associates.

"You may be asked to take on more responsibility and do more with fewer resources," Mattson says. "If the relationship is deteriorating, you'll feel like you are losing your support system."

When you were hired, you may have known the organization and role was a good fit that met your work and life values, Mattson says. With the changes in the organization you may notice you are no longer feeling satisfied with your work.

"Ask yourself: If you were to interview at the company today, would you want to work there?" she says.

If the answer is no, it may be time to start looking for a new position.

You are no longer passionate about your assignments.

"Do you wake up in the morning energized and look forward to your day, or do you dread it?" Mattson asks. "If getting out of bed each morning is becoming a challenge, then you need to listen to your instincts. We spend a majority of our lives working, so don't ignore the signs that it's time to move on."

Keep in mind that work can become routine in any environment, says Jeremy Smith, senior associate with recruiting firm AEC Consulting Group in Atlanta. It's important not to confuse a personal rut with a deeper problem at work.

"What should be motivating is the company's vision and the work being developed for the future," Smith says. "If the company's core mission and strategic plans are not appealing or are in conflict with your personal values, leaving is probably the best option."

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