You can find taxis all over the place and at any time of the day or night. Just step outside your hotel or onto any street curb and wave as one approaches, they are all “Yellow Cabs”. If you are close to where you're going, only a couple of miles, it shouldn't be more than 20 or 30 pesos ($2 or $3), maybe a little more if you have to go further. The taxis are really very convenient and cheap to use, and you shouldn't have any problems with prices as long as you always ask how much before getting in.
The buses are a very convenient way to get around. Bus signs are blue with a picture of a bus and the word "parada" means bus stop. The current bus fare to go anywhere in town is about 4 pesos (40 cents U.S.). Buses marked "Centro" go to downtown and on to Olas Altas, buses marked "Tunnel" take the bypass to Olas Altas (thus avoiding downtown PV), buses to the airport are marked "Ixtapa," "Juntas," or "Las Palmas.", buses to the Marina, Pitillal, Mismaloya, Nuevo Vallarta and Punta de Mita are marked accordingly. Buses going south to Mismaloya or Boca de Tomatlán depart from Calle Constitucion and Basilio de Badillo in downtown.