I started a new job a few years ago. I was successful at my last place, but was often stressed and in conflict with others that didn't meet my standards. We were encouraged to speak up and hold others accountable, but the way I did that was not really 'nice', even if it wasn't offensive or rude.

At my current place, I made a conscious decision to be 'nicer'. That doesn't mean I'm going to put up with BS or get pushed around, but I'm way more thoughtful with how I approach interpersonal relationships. I've found more success with less stress with this approach than I did with my previous tack. It really boils down to being "nice", or as I tell myself, "don't be an asshole".