These at really great!
I was planning in my free time (Ha!) to make a post for the disABILITIES FAQs thread about coping strategies for people with autism, cognitive disabilities or other conditions that may cause meltdowns or overstimulation.
Once I figure out how to get some free time, these will be a good start.
My DD does not have autism, but has some of the same traits.
One of my biggest hints would be to be aware of when you have come close to the point of hitting your limit and leave at that point. Even if you have not used all your Fastpasses or
DAS Return Times.
Trying to get that one extra thing in may be what puts you over the limit.
If your child is non-verbal and you use a communication device, make sure there are ways to say things like 'I don't like....I don't want....Stop...all finished...I feel (with appropriate variety of feelings)'
Too often, people program only positive things, whole sentences and wants.
Here is DD's Magic Kingdom page from her communication device (iPad with Proloquo2Go app)
She was angry that the CMs required her backpack to off of her wheelchair for riding in the wheelchair boat at Small World. She was not capable of expressing her displeasure at the time - she just had a meltdown which lasted for half of the rider. After we we're find, she could talk about it.