Shoes must be removed when you enter places of worship such as mosques and temples. In some mosques female visitors are expected to wear scarves. Taking photographs at places of worship is usually allowed but it is polite to ask for permission first
It is also polite remove your shoes before entering a Malaysian home,
The right forefinger should not be used when pointing to places, objects or persons. Instead, use the thumb of the right hand with four fingers folded under, which is the preferred method.
Most Chinese (believe in Taoism faith) will use joss stick (stick of incense of the kind burned before a Chinese image, idols) in their prayer ritual.
Of course there are other mean of sacrifice besides the burning of incense, paper with gold sheets in the middle, fruits & flowers and many other sacrifices imaginable by Chinese.
Taoism faith on the other hand will be treated quite lightly by most Chinese community. It's mostly for the reasons of redeem personal guilt, seeking peace, seeking wealth & health.
Most people will visit temple during 1st or 15th of the lunar months or whenever there is a need for spiritual burden like those mentioned above.
Islam is Malaysia National religion and fervent believers will worship Allah 5 times a day. Even if the time is not allowing, Muslim males must perform a compulsory Friday prayer.