The long period of Spanish rule, epitomised by the fervent embrace of Catholicism and, latterly, American influence have combined to make the Philippines a far more relaxed and culturally familiar atmosphere to many visitors than elsewhere in Asia though, to a lesser extent, the same Asian formalities will apply if you are visiting Chinese or other ethnic groups.

Handshaking is the norm in the Philippines, with deferential priority of greeting normally given to the eldest. A lighter touch than the assertive western style grip will hit the right note, but please bear in mind that, as elsewhere in Asia, the left hand is considered unclean. 

Kissing and hugging as a greeting is generally only acceptable as part of an established friendship, and in general overt public displays of affection are considered rude.

When visiting a church, conservative attire is recommended, though some establishments are quite relaxed. In general it is best not to wear very short or revealing clothes and sandals.

When entering a Mosque, Chinese or Buddhist temple, always remove your shoes, socks and hat, and wear conservative clothing that covers shoulders, arms and legs. In some places of worship, suitable attire is provided. 

If you are among more traditionally Southeast Asian communities, or ethnic minorities, never point at a person, or touch their heads, or pat them on the back, In general these communities are not used to being touched by strangers, so tapping, hugging or putting your arm around someone is likely to regarded as a violation and cause unintended offence. 

If you need to attract attention, motion with the palm of your hand. It is a common gesture in many societies to affectionately ruffle the hair of children, but the head is considered sacred in most Southeast Asian societies and such gestures will not have the intended effect.

Avoid political comment and criticism.

Tipping for services in the Philippines is not mandatory, though it is widely expected in tourist areas. Many restaurants already include a 10% service charge on their bills, or otherwise state that it is not included, leaving the charge to your discretion. 

When dining in the Philippines, food is often traditionally eaten using a fork and spoon, with the fork used for prodding and manipulating food on the plate and the act of eating performed with the spoon. Away from restaurants, it is also commonplace to eat without utensils, using only the right hand.