How not to speak consciously?

Example: At New Year’s party, I ended up talking super assertively with my wife, colleagues and might have also said f*** off to some people. Though I was drunk am pretty embarrassed now.

Also when I am not drunk, the things I say (loudly bitching about manager, colleagues , job, bragging about my achievements) end up making me feel pretty bad moments later because I know I am creating a bad image for myself and might also hurt my growth prospects.
Similarly, I keep focussing on negative parts of my job in my personal circle and now am seen as a negative person.

So my question is : How to speak consciously and deliberately?