One thing is knowing the business you want to do very well most people go into business without carefully understanding how the business works because they see people doing it and become successfull and they decides to try and they end up not been successful. Another thing to site is your location location matters alot and your business will be what the environment can't do without and it should also be in a populated area so your business can grow fast, school environment is always a good location to do any kind of business.
Anyone that goes into a business because a close friend is doing it would most likely not succeed, a business person must have a good understanding of how the business operates before going into also the person would need to be very strategic to be able to attract customers in other words being customers friendly is also very important cause someone who's rude would end up chasing customers from patronizing him or her, running ads is also important to promote businesses it would help attract customers from other locations to patronize the business.