Have more than one backup plan because you'll need it. And I'm not just talking about having a "Plan B," either. Take it all the way to a "Plan D or E" and just hope that you won't need to activate them.
Starting and running a business can be a lot of work, and it's important to take care of yourself in the process. This means investing in your own education and personal development, as well as investing in your business with the right tools, resources, and team members.
My business is a restaurant, The Walpack Inn. We have many local customers, especially those that enjoy exploring the Delaware Water Gap and spending time in nature.