Normally, I separate the download filename (what the server / person chose to call the file) from my own organization system file name. So if I download or get

Normally, I separate the download filename (what the server / person chose to call the file) from my own organization system file name. So if I download or get sent "Book.pdf", I'll rename it to how I'll remember it -- "Book Title - Author.pdf", etc. That being said, I don't think there's any right answer here, it's usually just a matter of time and energy. If I had to enrich every single file I download with a great title / detailed metadata / etc that I'd need to find that file later, that's all I'd do all day.