In response to this post on Lifehacker I thought I'd post how I organise my bookmarks.
I really only use Firefox at home and it is pretty easy to backup your bookmarks with that, so I don't really use anything else (although I'm beginning to dabble with social bookmarking sites like del.icio.us). I put my links within the following folders (sub folders as indicated) on Firefox:
Bookmarks Toolbar Folder
Firefox and Mozilla
Friends' Home Pages
Personal Home Pages
Radio & Music
Hmm, could probably do with being slighly more organised. Something to work on.