If you subscribe to either Rdio or Spotify, you can instantly turn all the music you tag through Shazam into a playlist.
Tying your Rdio or Spotify account to Shazam not only creates that playlist for you, it lets you to listen to entire songs right inside the Shazam app as well! You have to have a paid subscription to either Spotify or Rdio in order for this to work. You won't be able to play full songs or listen on-demand if you don't. If you aren't sure about a subscription to either service, both offer free trials you can take advantage of first.