I usually move all of a given year's photos to my backup drive(s) and burn a copy for "permanent" storage on dvds at the end of the year. I am driven to do this not by a masochistic desire for eternal file shifting or "year in review" sentimentality, but simply to clear room.
I take nowhere near the amount of pictures many do, so keep that in mind. My 2009 stats were:
Pictures (including about 25-30% of duplicate edited versions):
Size on Disk:
Might need to consider cutting back a little next year.