Ah, that's what tagging is...
I am rather ashamed to admit that when I first started blogging in 2006 I did not have a clue what 'tags' were and what use they would be to me as a blogger. It took almost a year for me to see the relevance of tags in enabling users to locate similar posts. By this time I had generated around 70 tags; most of these were unnecessary. So, since this Posterous site is a new start for me as a blogger I decided to go through all of my past posts and edit these tags. It did not take as long as I had anticipated and I now have a more conservative 37 tags.
EDIT: Ironically, I forgot to tag this post. Duh...