[expert] Mirroring /home?

[Theo Brinkman]

I know you can set things up so to mount /home from a remote machine, so
that no matter what machine on a network you use, your settings stay the
same, & all your files are the same.  Unfortunately, I'm thinking this
process might cause problems with using my laptop both on my home
network as well as the one at work.

How might I go about setting it up so that when I'm on my home network,
I mount the '/home' tree from my server, but still use a local copy of
'/home' while I'm at work?  How about keeping them both up to date?

        - Theo