Tracker's book breaks down meltdowns well, too:
http://www.ASDstuff.com
Long run, the goal with the meltdowns is to understand how stress leads up to them, and mitigate all that build up before it occurs. Usually the meltdown itself is only the last straw that broke the camel's back.
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Mom to an amazing young adult AS son, plus an also amazing non-AS daughter. Most likely part of the "Broader Autism Phenotype" (some traits).