Using Spotify, I listen to a large selection of music and a large selection of playlists [The same happens with my iTunes but that just filled my HD so I use Spotify].
I just want a way to have a temporary playlist such that if I see something I like I can say ,"Hey I like that !" let me add that to a temporary playlist so I can play it later. Right now I just copy the links to my clipboard and hold it there. But that disappears soon if I am working on other stuff and accidently close that window.