Because of my AVPD I stutter alot and often switch words in sentences, get confused and forget what I wanted to say so I started carrying a small note pad around for when I just can't face talking to people verbally because I'm scared they will be disgusted in my inability to speak properly and won't be able to understand me.
It's come really in handy as I find people don't bother asking as many questions as they notice it takes a while for me to respond if I have to write.
It also means that when I get in a taxi (I have to sit in the front seat because I have an assistance dog)
I can just write where I want to go and then explain I don't feel well so won't be able to talk verbally and people don't question it.