At first what I did was to write down all the expenses for the month, and make a budget based on them, looking at where I could cut back to save. Then, you have an income that you spend per month, and when you analyze it, you can surely save from somewhere.
That's so universal strategy you are following, everyone with some salary would have thought to buy all the goods to be used in the house, in bulk. And sometimes, those calculations go wrong, and you might have to buy more. To this date, I am not able to predict how much groceries I need in my home for the whole month. And If I buy all of them at once, I end up buying more even before the end of the month.
And when I compare the amount of groceries bought all at once and on a daily basis, I come to realize that I spend less on a daily basis. Maybe, when I bought in huge amounts, the hearts of our family members also became big and then they started to waste more. Yeah, I will call it a waste because they use more than they need.
Although I also tell you that after a few years of doing this, what I managed to do was to increase my income, which makes everything much easier.
I have only a few words for it in our local country which are: When the blanket gets bigger, people start to spread their legs wider. This means, that when the income of a person increases, he starts to spend more. But when a person spends money on household things and ends up realizing that he needs more money then these expenses work as a motivation factor for us and help us to work more and earn more.