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.
That is what is making many people failed doing a business, because they don't really have plan and they don't know how the business his, since they see someone successful in the business they will like to do too and see if they will achieve there goal on it too. The main thing you need to look at if you want to start a business is the environment that you are trying to start business. You need to observe it first and see if you are in the right place to do the business. Then you can go trough the target audience and see who you will offer your products too and make you successful. Not every business favours everyone they get some business that I will do and successful and if another person try to do it he can probably failed because the way you treat customers is not the way I will treat mine. To understand how to run a specific business help alot and he will make you achieve your goal easier. if you know how to treat customers well and you need to produce what customers need most in the environment you are doing the business.