Add some follow up guidance on how to go forward

[davidwyld]

I'd like these materials to be a useful resource beyond the course and to include some guidance on where to go from here.

I don't expect anyone else to do this, this issue is mainly to remind me and collect my thoughts, but if anyone wants to do any of this be my guest.

1. How to work alone.
2. How to work in a collaborative team.
3. How to bring my existing code under version control.
4. Good practice with git in general.