At some point in your career, someone won’t be nice to you in the office, and it can really leave you feeling uncertain.If your colleague said something rude one time, it was probably just an off statement. If, however, you notice the trend continuing and that person seems to be singling you out, it’s time to take action. Ask the offending co-worker for a quick walk or coffee meeting to mention your concerns.

A Colleague Is Rude to You

Whether your important client memo included a typo or you sent a message to the totally wrong person, one of the most common things to overanalyze is email. 
To avoid future email issues, go to the “Labs” tab of your Gmail settings and enable the “Undo Send” option. If you think your email contained a serious issue, it’s always better to confront it head-on in a quick follow-up email rather than waiting it out.

You Had an Email Mishap

... or Promoted
Your boss mentioned the word "fired" and looked in your direction? A colleague whispered that someone in your department was getting promoted? 
The easiest way to handle this situation is to keep doing whatever it is you’re doing. If you’re supposed to go somewhere else, someone will tell you.

You Think You’re Going to Be Fired

It's human nature to analyze situations. At the end of the day, we all want to survive (both literally and figuratively), and we turn to our brains to figure out how to do that when things get tricky.