I really like the approach that
uses. In short all of his images renamed upon import with a unique name and filed under one simple system by date into what he refers to as buckets. He discusses in detail all aspects of the managing digital files and from his discussions one can readily modify his approach. His system does require one to do some keywording and uses the database in Lightroom to find your images and he emphasizes making archive and backing up of your images.
For me treating all of my images the same makes it easier.
HTH,
Scott