I recite them in my head, and change them up to produce the best outcome I can think of. When I were younger, I imagined I did this to perfect my conversations and behaviour until the next time I relived my life (yes, I believed my life as a child was just a rehearsal) .
These days, I realize I will most likely never use 90% of the perfected conversations, but I believe it is just my way of processing the encounter. If I feel I did something wrong, I think of ways to avoid it happening. Perhaps it's a coping mechanism to re-program my memories of social blunders to better ones.
I also anticipate future conversations. If I'm going to the doctor, I've already had the conversation in my head atleast 50 times before I get there. I think this helps me by having scripts fresh in my mind and improve my reaction times when I get questions.
I can also see facial expressions when I replay these conversations, I don't notice them, or I do not realize I notice them in the heat of the social encounter, but sometimes I get an epiphany later with a clear image of a reaction in my mind. Once I even noticed details of an encounter that lead me to suspect my wife and I had misunderstood eachother and both was under the impression the other one paid for gas at a gas station. After a quick talk with my wife after my revelation I found myself driving back to the gas station to apologize 2 hours after we had droven off without paying. ..so it's not all bad. 
_________________
AQ: 42/50 || SQ: 32/80 || IQ(RPM): 138 || IRI-empathytest(PT/EC/FS/PD): 10(-7)/16(-3)/19(+3)/19(+10) || Alexithymia: 148/185 || Aspie-quiz: AS 133/200, NT 56/200