Interact with the Locals
Filipinos are a cheerful and welcoming people. They welcome guests with open arms and enjoy seeing tourists enjoy their homeland. So don't be hesitant to ask a native or speak with one. They enjoy being able to assist others. This is also the best approach to get a different perspective on each place. Show an interest in where the people go and what they like to do to fully immerse yourself in the Filipino culture.
Don't worry to interact with local people! In school, children learn both Tagalog and English, so you're unlikely to meet somebody who doesn't know at least a little English. Because everything is written in English, you won't have any trouble understanding street signs, restaurants, or anything else.
"Salamat" means "thank you" in Tagalog, if you wish to brush up on your language skills. And because "po" is the Tagalog counterpart of "sir" or "ma'am," you'll hear "thank you, po" a lot. If you know a few Tagalog terms, you'll wow the natives on your visit to the Philippines.