Visit the Cinepolis website and select your city, theater location and the name of the movie you'd like to see. Point your browser to cinepolis.com.mx and move your mouse over the yellow bar at the top of the screen. Drop-down the black menus you see to select your city theater(Guadalajara, for example), or "complejo" (Cinepolis Arboledas) and the name of the movie or "pelicula" you'd like to see. Click "Ver Cartelera" to continue.
Read through the description of the movie to confirm it's the one you want to see, then proceed on to your shopping cart. Click the "Compras and Reserva" sidebar located on the right side of the screen, then click a showtime at the theater of your choice.
Finalize your order and purchase your tickets online. Drop-down the menu next to the type of tickets you want to buy, select your desired quantity, then click the "Siguiente" button to continue. Enter your name, credit card details, address, phone number and email, then click "Confirmar Orden" to purchase. Upon credit card approval, the theater will email you printable tickets and a receipt.
Visit a Cinepolis theater near you if you prefer not to deal with computers and/or the Internet. You can purchase tickets in-person if you prefer, although doing so online will guarantee ticket availability in advance.