at 39 i still deal with this problem  however its not as bad as it used to be part of it is practice part is likely due to an air of respect i produce i listen to others i do my damnedest to relate and follow up with more listening  its hard but brief silence on your part will help you get your thoughts more in alignment while also showing respect to others it will never be what you want it to be and thats also okay owning up to mistakes asap especially verbal slips will help you immensely because one of the reasons you and everyone else has this issue is people not listening to you   we grow into this behavior as a child because were kids and people generally dont care what kids have to say but our brain at that time in our lives in firing on all cylinders and were flying past the point of the conversation it takes years of practice to overcome that impulsive behavior we learned as a kid when we slow down others will pay attention but its also uncomfortable because it feels like a fucking slog but again practiceand time  additionally certain conversational tricks can help you keep interject without it being a slight onto another like simply asking to be allowed to interject its surprising what people will let you do if you ask or if you already have a solid relationship with the other conversationalist   might as well add we have an emotional dysregulation issue in our brains so when we are emotionally aroused we will often lose whatever filter weve established and let loose often to embarrassment or some other undesirable outcome again taking responsibility will help other people respect you more and down the line they will listen to what you have to say even if theres more words than necessary