The easiest way whether you are heading north to Cebu or south to Oslob, Siquijor or Dumaguete is to wave down a Ceres bus heading in the right direction. You should allow at least four hours to get to Cebu City and about three hours to get to Oslob. To get to the ferries for islands to the south from Bato or Liloan will take about 1½ to 1¾ hours.
Please remember that it is most sensible to organise your time to travel in Philippines for earlier rather than later. Buses and ferries are much less frequent or stop after sunset and it’s more complicated to arrange alternatives in the dark. Please allow plenty of time for delays, especially if you have a flight to catch.
Oh and if you are travelling domestic, it is usually simple to book a last minute flight which gives you flexibility that you will lose if you tie yourself down to a pre-booked itinerary