Most often I use a method Don Firth posted back on April 16, 2013 6:54: Write down individual lines and scraps of them as I listen to a song. By the time I have all the words to all the verses I have the song pretty solidly in my head. And by then of course, the song has become an ear worm.

I personally don't recommend learning multiple songs at one time. One year when Ginny Hawker and Kay Justice (Appalachian/folk/country) were the Guest Artists at our Alaska Folk Festival I fell in love with their voices and their songs and bought all their recordings.

I found myself learning 7 songs all at the same time. I don't think it accelerated the process. :)