Hello there. We have been to PV every year for the past four years, and have also done a cruise. There is WAY too much to do in PV than you can do in one day. However, I have taken some day trips (some good, others bad) and have a couple to suggest. First, I highly recommend a "booze cruise". These are all day affairs run by several different companies, all basically taking the same route. We have taken the Vallarta Sol and the Si Mi Amor and loved it. The cruise begins with a relaxing cruise to Los Arcos where you can snorkel, then to two other wonderful and secluded beaches and villages. On one, you can either hike or ride horseback to a waterfall. I am not a horse lover, but TAKE THE HORSE! They are very docile and they know the route well. Once back to the boat, it is time for dancing and games. The entire trip is all you can drink and a great buffet lunch on the beach. YOU CANNOT GO WRONG! The jungle tour is fun, too, but it would be a shame to come to PV and not spend it out on the water. DO NOT TAKE ANY CITY TOURS OR THE TEQUILA TOUR, you'll spend the entire day on a rickety bus with an annoying tour guide who takes you literally only to miscelanous shops who pay him. Literally, you'll stop at a jewelry store, liquor store and a little mini market. That is it! If you need any other ideas, just email me.