I stuttered when I was young. My brain worked well enough but my
vocal chords and tongue didn't work fast enough. I'd get stuck.
I learned when I was 8 years old to "delay" my word production
by just a moment. So there's always a slight conscious gap
between thinking and speaking for me.
It's shown itself to be useful in other ways (self-awareness in
general) but it has also made me conscious of the entire process
of language production as I live it daily. I rarely get to just
"speak" because I STILL have to have a conscious lag in order to
speak without stuttering, even though the lag time isn't
perceptible outside of my own head.