Passport? Good.
A neon-lit diner front on a Manhattan street at night

At a glance

Tipping
Expected, and part of the price
Sales tax
Added at the register, not in the price
Cards
Taken almost everywhere, cash still useful
Buying alcohol
21 and up, photo ID asked at any age

Arriving

What customs asks you to declare, where a bag can wait, and one long-standing screening rule that has quietly ended.

Getting around

No national transit card, no national rule on eating, and a rental counter where the waiver you are offered is not insurance.

Where you stay

What the nightly rate leaves out, and why the apartment you booked for three nights may not legally be rentable.

Money

The number on the shelf is not the number at the till, there is no refund on the way out, and cash has not gone away.

At restaurants

Why the tip is structural here rather than optional, and what the service charge on your bill legally is.

Phone and internet

Getting a local number, and what to lean on until you have one.

Everyday basics

Smoking, drinking, and being asked for identification — three things the federal government leaves to the states.

How other countries compare

For a trip that crosses borders — the same question, answered country by country.

Sort the practical stuff before you fly.

eSIMs, rail passes, and airport transfers — the things worth booking before you land.