What stock to store for mill/lathe work?

[zcohen]

This past summer we bought a mid-sized manual mill and metal lathe. I've worked on mills and lathes extensively in the past, so I was able to get the appropriate tooling, but I'm having trouble coming up with a list of stock to carry to accomplish most tasks that we would need. So what does your team carry in terms of stock? I know it depends greatly on what you do as a team, but if you could still list what you get, we could use it as a starting point for our team.