Gluten & casein free diet and autism

If you have a child on the autistic spectrum what have you found to be most helpful ? I found the most important thing to be diet- a mix of Sue Dengates failsafe food and gluten and casein free food. Then watching that the child is not constipated as this can be a serious problem. Explicit instruction on every level and easy to understand homework from specialists, especially speech and physio. Looking at the positive side of autism and just loving the child.