I think it's a nice idea, but don't like the media structure into family and so on. Looks like he's going to have a ton of problems with duplicates and then edited duplicates down the line, which can easily be mixed up, and then you lose your edits and so on.

Pictures are better sorted with EXIF keywords. So, metadata stored in the picture itself, perhaps even in the MIME type. Thus, if a picture is family related, just tag it #family, or #personx and so on. This is why I store them in the same folder on a per-date basis. The rest is keywords edited with programs such as Adobe Bridge and so on.

As for document file name structure, text files and the like, I've used both `Date then Descrpition.txt` or `Keyword Title or Description and then Date.txt` with the date obviously being an ISO date such that `YYYY-MM-DD-hhmm` with `-hhmm` being optional, also for sorting reasons. Sometimes I like sorting on "topics" i.e. keywords or titles, but other times, such as in logs, I like the date first because it's more essential to know when you logged something, and not necessarily the topic.

You should think the date is superfluous since it's also stored in the system. However, my experience that when you move around a file, the date eventually changes, and certainly if you make a mistake along the way. Meanwhile a filename date doesn't change. Also it helps with list sorting where applicable.