Good idea, but if you are sending that file to a client, how does he know quickly know the image is yours, amongst many others? I now prefix my images with my business name. I have had an image used without my permission because of this.
Also, renaming with a date/time shot sequence enables easy sorting in windows explorer. I have had instances where file sequence numbers have let me down in this regard, especially when creating in camera dupes which I sometimes do, maybe at the end of a long day's shoot.
Using a heirarchial folder structure is IMO not a good idea for long term storage. Peter Krogh's book is well worth the money.