What cultural faux pas should I try to avoid making in Grundarfjordur?

"In Grundarfjordur, it is considered rude to be late for appointments or meetings, as punctuality is highly valued. It's also important to respect the natural environment, as Icelanders are very proud of their country's natural beauty. Littering or damaging natural sites is a serious faux pas. When visiting someone's home, it's customary to remove your shoes, so be sure to follow this practice to avoid offending your hosts. Icelanders value their personal space, so avoid standing too close to someone or touching them unless you know them well. It's also considered impolite to ask about someone's income or personal finances, as this is seen as a private matter. While Icelanders are generally proficient in English, making an effort to learn a few basic phrases in Icelandic will be appreciated. However, avoid mocking or making fun of the Icelandic language or accent, as this can be seen as disrespectful. Finally, tipping is not customary in Iceland as service charges are usually included in the bill, so avoid leaving a tip unless the service was exceptional," remarked another expat in Grundarfjordur, Iceland.