Do more research. If you decided that you want to manage a restaurant, then do research about the joint that you want to create and have. Are you creating a restaurant for the country of Mexico? Then if so, what are some of the meals served there? What food prices are you willing to give? Ask yourself these questions, and ask your friends if they have any suggestions. Also of importance in your research is the location of the restaurant. Do you want it on a busy street where many people will see it, or a quiet street with little traffic. Do you want it near some schools, in a financial district, or in a shopping mall. How many other restaurants would be maybe so close to yours that potential customers won't come at first.