In Flickr one uses tags to organize and pinpoint. Primarily, the use of tags can be for one's own use or for public searches. For example, a general, broad search can turn up all 33 of my pictures of London; whereas, I can quickly locate only two examples of the changing of the guards. In fact, the vast majority of my hundreds of tags point to a single photo.
On the other hand, blogger.com's labels are for self-initiated organization only. The emphasis is on general, self-described topics. Moreover, labels with a single entry are somewhat unnecessary. It took me a little experimentation to figure this out.
I have probably labeled only a quarter of the entries in my eJournal and images. Now I've come to a very sad realization though. I have discovered I spend a great majority of my time here discussing these three topics:
My Work (BCIT)
My Computer Use
My City (New Westminster).
Other data abounds but I really haven't got the labels all worked out yet. It may take a while ...