Think most of the practical advice has been covered apart from be careful with your vauables. Touchy subject but distant family or friends may wish to borrow some items which you have spare..

On the first trip even though i had a new frangled camera phone and bought a new digital camera with me. We took far to few pictures sounds silly but the time will fly and before you know it your be back in rainy Manchester

Dont forget to be practical keep receipts, tickets stubs for plane, not really needed but just in case.. Ensure you get pictures together not hard normally has im sure sometimes your have family or friends around. If you get the chance back up them photos just in case camera is seperated from you

Also always nice to get a cheap disposal camera or if you have an old film camera although maybe harder to find in the uk than even just a few years back.
Leaving some pictures with your mahal and family is a lovely gift and saves time going to internet cafe and making some dodgy prints.

Also handy for application time

Dont forget to check out the duty free not sure about cebu but manila has a huge one a short drive from the Airport. Like no Duty free you will have seen, choclate, corn beef and coffe far more important to sales than beer or wine it seems A six pack of coffemate or corn beef goes far further with many families than booze.

Dont forget to buy pressies for all the family, if people dont get a pressie they will feel left out. But does not need to be much by Brit standards.

Budget your money, far nicer to send some of the family to the sari sari for a bottle of coke and some snacks or get a big tin of ice cream and sit with the family than go out every night. Get to know the family in there surroundings not in a Jolibees.

As you know dont assit going to the market or shops locally it will increase prices once you go home sometimes

Let a phill argue/haggle on your behalf, trust me it will get heated now and then.