Archiving recommendations needed
 

I have a lot of emails collected over the years that I cannot delete - I
need them. As a result, my OE has become bloated. I would appreciate some
ideas on archiving old messages. I would need to create different
identities, one for instance would be for stock market subscription
newsletters. Another is for an art subscription and all things art related.
Yet another is for music. I could make an identity named by years,
including 2 or 3 years for each one.

Some things don't lend themselves to yearly sorting...you need everything
together. Oh well, I think I've said enough so that you get the idea. I
still want to "prune" my archives, though, so I'm open to any suggestion to
constructive methods of handling large quantities of emails.