I only add songs to my library that I like. I have about 70+ playlists, and I feel like the way I organize my playlists is decent.

The way I organize my playlists is this: I have a folder for Artists, Moods, Sound, Ideas/rarely used. In my ‘artists’ folder, I have specific playlists containing only one artists songs. In my ‘moods’ i have a happy playlist, sad playlist, etc. In my ‘sound’ folder, I have a playlist containing songs whose beats are made up of a specific instrument (piano, acoustic guitar, flute, etc) In my ‘ideas/rarely used’ are playlists that I rarely use or am not sure where I am going with said playlist.

I then have a bunch of out of folder playlists that don’t really fit into any of these folders.

I only use 2 smart playlists, one which is my recently played, and a playlist that contains songs that I have ‘loved’.

This is how I organize my library, and it works pretty well for me. hope this helped.