I used to translate for the hearing impaired, so I stealthily spell out in sign language letters with one hand one word over and over and over. Not where anyone can notice, but I will literally do it until my hand cramps. Sometimes the word I am signing creeps into my conversation. For example, if it is "reality", then I will say something like "Hey when you go to the store, will you pick up a jar of reality?" when what I really mean is pickles. Sometimes this can be embarrassing if the word I'm signing is a person's name or a word like M*****F.

Like Anneinside says, I had to work through it by signing something terminal, like a list of items (not numbers). I don't know why, but that sometimes works for me. Like instead of signing numbers nonstop all the way to infinity, I sign Robert Frost's "Stopping By The Woods On A Snowy Evening." Sometimes I get hung up on the last word, but usually i can find something else to occupy my mind by then. I'm a writer, so having an outlet that allows cohesive thoughts to flow from my brain through my fingers really works, too. If I get locked on, I can work on my book, and eventually I move past it without even realizing it. I hate to even ask this, but have you and your doctor ever talked about Aspergers?