Whatever you do, don’t bring drugs into Indonesia. This is punished with the death penalty. Other prohibitions include weapons and pornography, as well as any plant products (especially fruit) and Chinese medicine.
You’ll need to declare alcohol and cigarettes, DVD’s, and any prototypes for commercial use at customs.
With nothing to declare, you can usually clear customs very quickly.
Only 1 litre of alcohol is permitted per person, as well as a “reasonable” quantity of perfume, and 200 cigarettes, 25 cigars or 100g of tobacco.
It is forbidden to take any Indonesian antiques out of the country.