1. Not being productive on the job.
2. Not working at a job you’re passionate about.
3. Thinking that money is everything.
4. Having a bad attitude.
5. Not believing in yourself.
6. Not solving problems
7. Relying on others to get your job done.
8. Waiting for your employer to notice you.
9. Not having your own, big career goals.
10. Overstating your qualifications and taking credit for
things you do not do.
11. Gossiping and playing office politics.
12. Not being flexible.
13. Burning bridges when leaving a job.
14. Acting inappropriately. (Examples would be using racial and
sexist slurs.)

Author's Bio: 

Certified Career & Job Transition Coach
M.A. degree in human development and administration