Hello,
First of, if it's busy in the park, buy an express pass. If you have the money for it, go for the most expensive pass, giving you unlimited access to the express pass lanes.
Last season, Baco did not have an express row yet. Don't know whether there will be one this season. If no express row available, make sure you are at the entrance at least 30 minutes before official opening of the park and get in line immediately at Baco. You should then be in one of the first Baco rides of the day in about 30 minutes, something which will take you at least 1 hour the rest of the day.
Use the express pass for Dragon Khan, the minetrain Diablo and Stampida. Don't miss the junior woodie Tomahawk.
Use the express pass on the 3 waterrides aswell.
Ride Hurakan Condor till the ops put you in the stand up tilting side.
Whatever you do, don't miss Templo del Fuego.
For the rest, enjoy the beautiful theming at Port Aventura.