Number one lesson is that in order to own a car you have to pay USD$65-$80,000 for a certificate of entitlement that is valid for 10 years. Yes, $80,000 just to have the right to own a car. Then after taxes and import duties you can be paying USD$500,000 for a Porsche 911 or USD$300-400,000 for a BMW 5 series.
Chobani yogurt that I bought on sale last week at my local supermarket for 99 cents is about USD$8-$10 in Singapore.
A small corporate apartment can cost USD$10-$12,000/month.
If you are thinking about working abroad for a higher paying salary, also consider the cost of living or make sure to get the expat package.