I had a great visit there in 2013. Nearly everyone speaks English, but don’t just assume, ask (in Dutch) if they speak English. Very walkable, with pretty great transit. Lots to see just walking around. Just be a normal person and you’ll be treated fine.

Don't get really drunk or stoned and end up being obnoxious.

Try to be aware of traffic (especially bikes) and of blocking sidewalks/alleys etc. Look both ways on every lane of traffic you cross (including both bike lanes).

Try to branch out your trip from the exact center of the city (or by the train station) and don't rent an Airbnb inside the city center (they drive up local rents).

If you're standing on red bricks or red tarmac, you're probably blocking the bike lane.

If you can't see the bike lane, it's likely that you're standing in it (they aren't always marked).

Digitalprimate

Oh simply be polite and most of all have a sense of your surroundings/situational awareness, i.e., don't get in the way. You probably want to spend as little time in the main "downtown" area (roughly central station to the Rokin) as possible.

Although everyone under 80 years old speak near-native English (I exaggerate), you'll endear yourself by learning to say good morning, good evening, thanks, and please in Dutch and to start conversations by asking "Is English ok?" in Dutch.

Basically just don't be a jerk and the native Amsterdamers will happily take your holiday money.

don't get drunk and fall in the canal and drown when you're trying to take a piss

Don't