A lack of emotional intelligence
Everyone knows that you can get fired for being unable or unwilling to play nicely with others, but what trips up a lot of people is having a poorly developed poker face. If everyone can tell when you're bored or irritated or that you think something a colleague is saying is stupid, this will catch up with you. Emotional outbursts, belittling others, shutting co-workers down when they speak, and just generally being a jerk are other ways a lack of emotional intelligence will leave you looking for work.
Misusing company supplies or resources
Many people don't think twice about taking a pack of printer paper home when they've run out or using the company's FedEx account to mail a last-minute holiday gift. However, in the eyes of your employer, this is stealing. Abusing company resources is a serious offense, even if the monetary value of the item doesn't add up to much. Catching you in the act can also be a good excuse if your boss is looking to fire you. It's a lot easier to document and justify firing someone for stealing than it is to fire them because they are just okay at their job.
Speaking on behalf of the company
This isn't just about sending out an unauthorized press release or venting on the company Twitter account, because most people already realize that these types of things will get them fired. I'm talking about answering a question when a reporter sticks a microphone in your face or identifying yourself as an employee of the company when sharing your personal opinions online. This creates the perception that you're speaking as a representative of the company, even when you aren't trying to, and that's definitely something that can get you fired.
Bringing it all together
A lot of people make the mistake of thinking that they can only be fired for getting caught making one huge misstep, such as sexually harassing a colleague or bad-mouthing the boss. The reality is that it's usually not that dramatic.
This article originally appeared on LinkedIn.
Travis Bradberry is an award-winning author and the co-founder of TalentSmart, the world's leading provider of emotional intelligence tests and training.