What should we do to start a good business from small scale?

Today life has become more challenging in many developing countries of the world.Many of the people are living a very hard life.Nowadays,unemployment is a social and heart breaking problem.People have to earn to fulfill their requirements.I think so that in this regard, business on a small scale has a great importance.It could help people to earn money from a smaller scale.We should start a small business from needy people through which they can earn enough money to live a pleasant life.There are thousands of people all around the world who have started these kinds of small businesses to help the needy people.
What necessary steps should we do to start a good business for those needy people?