Someone keeps talking about the number of each book that is listed. Where do you find that? I know I can see it if I add it to my reminders, but then this really clogs up my reminders. Where else can I see it?

I believe that you can only see it in the Reminders. Sometimes, I put the book in my reminders to see how many copies there are, then I put a Note on the book with that number and the date. (Notes are only seen by you, and you can see them everywhere you see that book). Then you can remove it from the reminders and not have it cluttered up.

I also use Notes to see where I am in the Wish List. I put a note on the book with my current position and the date, and then every so often I can see how fast/slow its moving up the WL. The Wish List only shows your current position, and if I didn't use the Notes, I would never remember what number I was at a month ago or two months ago.

Tags are different, Tags are seen by everybody, so you don't want to make personal notes on books using Tags.

Notes are great, another thing I use the Notes for is sometimes I might have 2 copies of a book with the same ISBN. You can only post one at a time, so I'll put a Note on the book telling myself to post the 2nd copy after the first is ordered.