Here are some tips to keep in mind as you consider, prepare for and operate a publishing business. Your product is at the heart of your connection with readers. You can only succeed by making a product that your readers really want. It's better not to publish in the first place than to skimp in this area. Even if you identify a niche so golden that you initially succeed with a mediocre product, some competitor is almost sure to do a better overall job, possibly wiping out your business.
Good intentions are never enough.
Your product really does have to be the best that you can make it. If others are already publishing in your market, study their products. If your publishing idea is unique, study good products in related fields. Look at what all successful publications do well and why their publications work for their readers. And once you do start publishing, establish a dialog with your own readers to find out what they need and want.