There are lots of little store in the Yucatan and at first site you might think they are pretty useless unless you want a back of chips or a soda. They do serve a very useful purpose in the community. They are distribution points for tortilla for one. Guys on motorcycles deliver them in coolers and restock throughout the day. That way everyone in the area can come and get fresh tortillas for the day. The stores are also handy for small amounts of things. For example the other day I needed one balloon for a project. A bag cost about 70 pesos in a big store. I was able to buy one balloon for 2 pesos in a little store. So helpful. These store do make money off taking larger amounts and making them into smaller amounts but this can be helpful as in my balloon shopping experience went. They also have been time tested and stock the most useful products for the community.
So for all you that are planning on moving here, check out your corner stores and see what little candies they have or products that are helpful to have in a quick trip rather then going to a big store and waiting in line.