Took hop on hop off bus. First stop was a 5 euro cab ride from port. Make sure you get on the correct bus for which loop you want to go on. Used the red buses. Sagrada Familia is a must, as is the Las Ramblas.
Booked aquarium and kids center. The kids center is a must for any small children. Has air conditioning and children could play there all day.
Took free Marseille shuttleinto town and walked to the main shopping area. Took little train up to Notre Dame. Great views of city.
Took a private cab to Taromina from Messina. Great Views, shops and cafes. Went to Greek Theatre. Had wine and ate across from the church and Orion Fountain on small street.
Took a private cab to Medina, Sidi Bou Said and carthage. Round trip was 40 Euros. He haggled and started his price at 80. Just walk out the port station, all the regular cabs are waiting for you. Medina markets were definately the highlight here. Not much to see other than buildings and shops in the sidi bou said.