My brother has Aspergers and I remember not fully understanding why he was the way he was or how to help him. Here are some tips from my family about how to help any child facing this condition:
1. Understand that Aspergers is lifelong. While certain foods and treatments may help kids, they'll always have Aspergers. You need to accept that first and foremost.
2. Stick to a schedule. Kids with Aspergers understand routine and familiarity. They almost can't handle change and will lash out when it's encountered. Helping them keep to a schedule is beneficial to them. When change can't be avoided, you'll have to explain, in great detail why this disruption happened. You have to understand that they can't just move on the same way others could.
3. Be prepared for social interactions. Kids can be mean. You need to explain to your child that they have a condition others might not understand. That doesn't make them inferior in any way. They excel in many other areas (generally intelligence) where normal kids struggle. Help them identify their strong points and use them to gain friends. For instance, if your child is great at gaming, let them know that they need to show this skill to other kids. They'll be the first ones picked for video game sessions every time.
4. Find out their areas of interest early on. It can be difficult to communicate with children with Aspergers, so finding out what they like and what makes them happy is essential. If they show an interest in any sport or activity, get them as actively involved as you can. This will be great for their social growth.
5. Learn to explain empathy and the importance of emotions. It's difficult for kids with Aspergers to understand what other people are feeling or even care about those feelings. Explaining this to them and helping them identify when someone is sad, angry, or happy will benefit them great.