Perhaps the most important choice you can make will be his education - luckily Singapore is well served by a network of international schools that maintain high standards and will expose him to the encouraging smiles of fellow expat children. You may also encourage your children to join you for activities with your national association or club in Singapore where they get the wonderful opportunity to meet people the same age and with the same experiences. However you should also encourage him to meet local Singaporeans too, since part of the pleasure of being an expat child is learning about different cultures and understanding diversity. Volunteering is another great way of giving your child positive experiences. Try to keep your own doubts and fears from your child - you are a role model and your reactions will partly shape his.
Optimism is a powerful tool and a great way of keeping the family together.
When your child faces problems or is sorrowful about leaving, you can do well by being really patient and generally being available. Learn to listen very carefully but not be judgmental. If you are concerned about your child losing his own cultural background, you should expose them to literature, theatre and anything from your own language and cultural origins. People from back home for example are a great source of videos, tapes, books which you can share them. Spare some time to enjoy maps, pictures and stories from your own country, and get them to point out differences and similarities between both countries.