When you buy beer buy it by the pale it will come in a pack of four at a time and will save you money, they wont tell you about this unless you ask.
Also get the drink special of the day , but tell them to keep the glass, that should also save about 3 bucks a drink
Eat the early dinner
Skip the first show and be ready for the repeat of the first , that way you get good seats and you will see the third show which is actually the 2 new show of the night. and keep your good seats.
In puerta vallarta there is a food spot right at the dock along the shops.
They have the best NACHOS anywhere and dollar beers.