So you’re planning to launch a new blog but don’t want to reveal it to anyone quite yet, for a variety of reasons. You want to be able to view individual posts as they would normally appear, but neither want them indexed nor visible to anyone. Or you want to test some themes on an existing blog without your visitors having to see.
There are a few ways to accomplish either, and it’s relatively easy. Just make sure you take precautions to back up your existing blog and database. (I’ve wiped out a few sites. Fortunately, they never had more than about 9 posts, and could be fixed manually.)