Also, try as often as possible to spread your data around in case of
disaster.
For example, I have a great purchased (legal collection) of MP3's from
emusic.com. I have a large folder just for them on my "data" drive and I
also have another duplicate folder on another external firewire drive. I
have "financial" Quickbooks data in my XP system drive and a duplicate
of that on another IDEE drive which I use primarily for video editing.
By making sure you always have at least 2 copies of a folder, housed in
different physical drives (not partitions in the same drive) you reduce
the risk of losing data if your drives goes down.
It's a bit of a pain, but doing this has saved my ass dozens of times.
Just a workflow thing you get used to, once you do it for awhile.