Sorrento is nice, but go to Capri
Sorrento is gorgeous... we took the ferry (il traghetto) to Capri and spend the day on the beach, it was seriously the best day of my life. We felt like jet-setting Italian royalty. And the best part is, we got to experience the high life without having to pay a lot of money... only the fare for the ferry and an unfortunately overpriced lunch at an outdoor cafe. Just don't miss the last boat back to Sorrento at the end of the day... then you'll have to pay for a hotel room!