Small cultural details that help you feel more confident and respectful.

Shared dishes are normal. Take modest portions first. Leave some food rather than appearing to still be starving if hosts insist — follow local cues. Pointing with chopsticks at people is impolite.
Dress modestly, keep voices down, follow photography signs, and do not climb restricted structures for photos.
Queueing has improved in many cities; still, be patient in dense transport hubs. Offer seats to elderly when appropriate. Avoid sensitive political debates with strangers.
Tipping is not a universal norm like in the US. Follow venue practice; private services may discuss gratitude differently — ask if unsure.
No. Politeness, patience, and observing locals go a long way.