For me, if I feel a meltdown coming I try to write about in a jounal. However, most of the time I can't stop my meltdown because it was caused by many different things being piled on top of me and the cup just over fulls and i have a meltdown. However, what you can do is let your son have the meltdown. I know that is no simple and is very hard but I know that once I have meltdown, I feel a little better, like a wieght was lefted off my shoulders. However, if you can figure out what is building up the stress that causes the meltdown, you and your son can less the times it happens or can plan that it will happen, like I would have meltdown every April or May because school had gotten to much for me. So I just knew that it would happen and once it did things would be better. I hope this helps you.