Hi.... this was a good tip - But I still have a problem. I jsut switched, and I am not happy to see that when I go to the master music list (thanks for the tip in finding it) that it does not include the number of songs i have in my collection. This is disconcerting, because after such a major switch over, I want to double check that all my music is still there. The number appears at the top of my playlists - But Any tips on finding the number on the master list? Thanx!
You may be using a Windows version, because there is no View/Show Sidebar in iTunes 12 for Mac (as there apparently was in iTunes 11). Instead, in iTunes 12, you can only see the sidebar while in Playlists. Either from the My Music pane before you go to the Playlists pane, or by opening the Music selection at the top of the sidebar after you do go to the Playlists pane, you can select the songs you want from the songs list, and THEN drag and drop them into the desired playlist(s) in the sidebar.
PS: Sorry, just noticed this topic is about iTunes 11, not 12, but left it up anyway, in case it's helpful