Often, I create a development site, such as dev.example.com, test.example.com or staging.example.com, before making any change in the production site. I even have a dedicated server to host the dev site of all my clients. If you don’t have a development site on your own, please do create it. It’d save you a lot of time in the future. Your production site might become overnight success and you can’t afford to tryout important changes in the production site.