Thanks DTLow ＆ briancaldwell for suggesting hierarchy within Tags. I have tried implementing it in the simple collection of notes that I have and it's working out so far. Thanks again!
Is it possible to have multiple levels of stacks? For example, ideally, I will have a root stack named "Audio-Video", which contains stacks "Music" and "Photography". And under "Music", I will have NoteBooks for each genre, e.g. "Jazz", "Classical", etc. Can there be multiple layers of stacks? I tried dragging my "Music" stack under "Audio-Video" and EverNote won't let me...