How not to get fat?

1) Convince yourself that a 1.5l of coke does not cost $0.99 in New Zealand or brainwash yourself the fact that with $1, you can only get the same of 500ml in Singapore
* I can't understand the rationale why a 500ml coke cost $3.05 in New Zealand whereas a 1.5l cost $0.99
2) Quit on those potatoes. They cost $0.25 for a big fat one which is enough for a meal.
3) Learn to eat vege. Meat are dirt cheap here, just like Singapore.
4) Exercise in winter. Now this is hard with the cold weather, but you got to have more discipline and try at least!
5) Don't hibernate please.