First, you should learn how to do it. This doesn't mean that you can buy some salads for the tutorial. Customers are very picky. If they don't taste good the first time, they won't patronize again. So you need to know how to mix it healthily and how to make it taste better. At the same time, if you can have your own unique sauce, you can stand out from a pile of light food stores. The most essential things are ready, then consider the store decoration and personnel.