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

"In Noordwijk, it's important to avoid being late for appointments or meetings, as punctuality is highly valued in Dutch culture. It's also considered rude to interrupt someone while they're speaking, so try to wait your turn in conversations. Avoid discussing personal wealth or income, as the Dutch tend to be private about their finances. It's also considered impolite to not greet shopkeepers when entering or leaving a store. When dining, keep in mind that the Dutch usually keep their hands on the table (but not their elbows), and it's customary to say "Eet smakelijk" (Enjoy your meal) before starting to eat. Lastly, while the Dutch are known for their directness, it's still important to avoid being overly blunt or confrontational," mentioned another expat when asked about moving to Noordwijk, The Netherlands.