The low-cost airline Cebu Pacific now has a web check-in feature. It is available if you chose Seat Selector when booking, and you can check in from 48 hours to 4 hours prior to your flight.
If you checked in via web, you only need to be in the terminal at least 45 mins before the flight, if you have checked luggage. If you only have hand-carried luggage, you can go straight to the pre-departure area (they close the boarding gate 15 mins before the flight, so allow more time than that).
You can also print the boarding pass from the web site.