Amanda at Blogger Buster has a useful guide on 'How to Create a Sitemap with Google Feed Control'. This lets you create a page that automatically lists all the posts that are categorized under various 'labels'. (It doesn't include the full posts -- just a "table of contents" -- so is much easier to navigate than Blogger's default label pages.) I've so far set up four such lists:
(1) Ethics Sitemap (for my various ethics and political theory categories)
(2) LEMMing Sitemap - Language, Epistemology, Metaphysics and Mind
(3) Useful Lists of Blog Posts - for higher-order labels like "favourite posts"
(4) Full Sitemap -- all my categorized posts on one page.