[Nottingham] A user permissions question

[eddacker]

rather simple, after all.
as root I set the system, the apps, the desktop, etc.
when I add in users what permissions do they need?
How do I define user space?
Where are common users going to need to go?
My best guess is run the apps, Internet and access files.
what is common administration?
How much choice do I give and what is the best way to give it:?
rather simple?
Thanks,
eddacker