Quickly drive competitors out of business
When your starting a new world, go to the "Reports/Competitors" tab and find out which competitor has the lowest cash/net worth. Then, go to the "Marketing" tab and hire a ffew Goons. In a few days, you will have to visit the loan shark but it is worth it. If you hire four Persuasion Trolls and set them in front of the weakest competitor's store, the competitor will run out of money and will be driven out of business. When they are gone, repeat this with the next lowest competitor until they are all driven away.