Be sure to make a project organisation chart.
- Helps with assigning responsibilities
- Helps new team members identify the roles of the rest of the team and who to talk to for their tasks.
- Makes communication between team members easier.
Ideally list contact details in the chart as well.
Keep up to date (this is better if done automatically).
It wastes a lot of time in a big project trying to find someone only to discover they are not on the team anymore, so this is an important task.