First, think of a general theme or setting, like a space adventure or a medieval kingdom. Then, create a starting point for the story. Next, come up with different choices that the reader can make at various points in the story. For example, in a space adventure, the reader might choose between investigating an unknown planet or continuing on a set course to a distant starbase. Each choice should lead to a different sequence of events.
One way to create a 'free choose your own adventure' story is to base it on your own experiences or interests. If you love hiking, you could create a story set on a long - distance hiking trail. The reader could choose between taking a difficult but scenic route or an easier, more well - trodden path. As you write, describe the sights, sounds, and challenges of each option in detail. This will draw the reader in and make them feel like they are really on the adventure.