Not following the front end "standards" of the company I work for ( Sass variables, Methods, CSS frameworks, mixins, etc.) even though we had a meeting talking about following standards to improve the workflow a day before.

But... but...
SASS variables makes it so much easier to use the same values across your stylesheet, and mixins saves you a lot of time in declaring styles for classes.
Why would you not use them?

@JTBringe of course I use them, I'm talking about naming conventions, BEM conventions, I many times add new mixins that the other Front end developers dont know how to use, they often have to adapt to my "Style" in coding, even though we agreed in having the same "Style"