Nothing sets the mood like a good love song. Use Spotify to create a Valentine mega playlist for you and your special someone. Some must-adds: "Say Yes" by Floetry, "I Want You" by Marvin Gaye and "The One I Love" by R.E.M. After the playlist is completed, right click on the playlist to share the list via Twitter, Facebook and Tumblr. If you've got Spotify Mobile or a good Bluetooth speaker, you can amp things up with your best John Cusack "Say Anything" impression.