A good roadmap helps communicates the mission and strategy of an organization or initiative. Building and curating a roadmap is a great way to lead a diverse group of internal and external stakeholders to meet an objective.
The book Product Roadmaps Relaunched by Lombardo, McCarthy, Ryan, and Connors is highly recommended to provide context to the examples provided here. When presented to stakeholder groups, each section should distilled into a single page or slide with only those parts that are relevant to the stakeholders. The book does a great job of describing how to build stakeholder-specific views of a roadmap.
Below is an example of a roadmap for a person's life, which is even more complicated than a business venture. Use this example is your starting point. Just copy and paste it into your favorite word processor and start editing. In fact, make two - one for yourself — your own lifemap — and one for for your business venture.