...and backing them up to CD or DVD every so often.
Reason I ask is that I'm going through a heck of a time trying to recover old wargame scenarios -- several major sites which were supposedly "good" to go for years all went "boom"; and recovering the files is an ordeal.
Case in point; Yahoo Groups. Even though all the text messages are still there; I'm finding that if you want to download anything; even if you uploaded it yourself 5 minutes ago, it throws "access denied" messages.
EDIT: Yahoo groups appears to now be working for me. But I was frightfully scared for a moment.