Getting ROI from Mindmapping in your personal life - Supermarket

One of key issues I will like to focus on, is being able to determine how to get ROI -stands for Return Of Invesment- by using Mindmapping techniques in you professional and personal life.
Obviously, there are two main ways to get a higher ROI:
1.- Generating more incomes or
2.- Reducing costs.
(It is just a simplification to understand easily)
In this particular post, I will talk about how to reduce cost by using Mindmapping techniques, when one goes to the supermarket.
I have developed a particular template with the most common articles in a supermarket shopping list, grouped in different branches.
Within this template (I am also looking for a new repository to put on all the templates that I am using in the posts), I am using different labels and markers to determine which are the cheaper prices in the different supermarkets for the different items.
Every week, I think in advance the items I must shop and by filtering out, I am able to determine which items should I buy, in every supermarket, in order to get best prices.
Obviuosly some improvements can be added up:
1.- Determining not only price but price and quality to make the further choice.
2.- In case of using one only supermarket, determining the position of every branch in a clockwise direction consecuent with the location of every articles group, within the supermarket.
As a result of using these techniques in your shopping list, you will get:
1.- Not forgetting any item, which implies revisting the supermarket.
2.- Taking advantage of the prices, discounts and so on.
To sum up, it is just a simple application to show that some kind of ROI can be returned by using these techniques in both, personal and professional life.