Social Bookmarking

Having mentioned a few of my frustrations with Bloglines..
One of the posts I tried to "save" and hence lost was my thoughts on organizing and/or creating a method for tags on my del.icio.us account. I have been using that extensively for the last couple months, along with Bloglines and building up quite a collection. It was important to me to have a stable method of tagging, so that I could actually find and know how to find the sites again.
I worked out some general terms that I would use, and from that also a theoretical hierchy of terms. So that one term, say "InformationLiteracyResources" would indeed have all of the information literacy resources I find, but each resource I found would also be broken down into a smaller category defined by terms such as "Evaluating Information" or "SearchingTools" which could even further be specified as things like "videos" or "tutorials".
That way I can keep track of EVERYTHING Information Literacy related, but also those things I might have a specific and immediate need for (a tutorial on evaluating information, for example.)
As needs for new categories and subcategories have arisen, I try to take a moment to think through what the best, overarching term would be for me to remember and return to. So somewhere deep in my mind it all does make sense.. now it's just a matter of remembering it all. Which is proving to be more difficult than I think it should be. hmm...