This is where other parts of social coding movement are meant to focus. Your question breaks down into multiple challenges, and likely even more best-practices as solution patterns to choose from. You might formulate this as a #documentation:challenges topic, and relating to Inception phase of FSDL.
Here is a strategic choice, like e.g.
- I’ll start and maybe I will get some contributors, which would be nice.
- I’ll start but given the scope I must get a maintainer team and multiple active contributors.
- I’ll start but it must have a strong community that sustains the project, and will be active participant in a larger ecosystem.
Goal of the crowdsourced Social Coding website is that eventually you could use it as a guide for making such decisions.
Related to the best-practices, which are just documents, there’s the creation of automation tools to accompany them, such as IdeationHub which aims to make the transition from ideas to concrete projects easier and more inclusive.