The most important factor to consider when starting to build a business is the target audience. You have to think of who would you want to cater to. Who are the communities that you may profit off of. Like for example if there is a school near you, you should know that students would be your target audience. You should start a business where students can buy materials from or a place they can study or even hang out around. I believe that if you studied your target audience, the first step of your business is already successful enough.
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.