For a single project you might have:
- repo(s)
- deployment(s)
- domain(s)
- Saas' (Sendgrid, Segment, etc)
- Notes, docs
- interesting/important web links (think validation post on IH, interesting article that talks about your market, etc)
- email address(es)
- important contacts
- assets
- chats/communication channels for the team if applicable
- communities around the product if applicable
- passwords for most of the above
- more?
How do you manage to keep track of all these things for each side project?