1: Be welcoming
2: Help potential contributors evaluate if the project is a good fit
3: Make governance explicit
4: Keep knowledge up to date and findable
5: Have and enforce a code of conduct
6: Develop forms of legitimate peripheral participation
7: Make it easy for newcomers to get started
8: Use opportunities for in-person interaction—With care
9: Acknowledge all contributions
10: Follow up on both success and failure
