I used to have that issue. Still do occasionally. One thing that I've learnt really helps is.... *drum roll*.... shut the fuck up.

Seriously. I've worked a LOT on engaging the filter between my brain and my mouth so that I don't just blurt out the first thing that comes to mind. Also, it forces me to listen more, which in turn improves conversation significantly and helps me DHV.

It doesn't happen overnight though. Takes a while to learn to switch that filter on. A lot of the time I find the best way to do it though is to try saying nothing for as long as you can.

Might not be the best or the ideal way, but it seems to be working for me.