I am totally hopeless at remembering to add labels to my blog posts, even though it is such a useful tool. So I've just been through and added them to all my 2009 posts. My new blogging resolution is to try to remember to add them to each new post I make. We'll see how it goes, but I'm going to try.
I've also added the labels list to the sidebar, down at the bottom above the posts archive, so check there if you want to.