How to save some money

Hello. I have been a student for a year now and I have leard something that have helped me save some money.
We all know that we use alot of money on food. But when your on a tight budget you cant always buy the things you want.
I live in Norway and here the cheese is soo expensive. But if you buy the biggest bag of cheese and divide it in smaller bags it will cost so much less.
These new smaller bags you can put in the freezer and take up when you need it.
So now I can eat as much cheese as I want for a quarter of the price.