Immigration & documents
Choose the right nationality/residence route first, then gather the original documents while they are still easiest to obtain in your current country.
Your nationality and the reason you're moving decide which route applies — Dutch nationals typically use Declaration Van Rechtswege, EU/EEA nationals don't get automatic entry, and most other nationalities go through a residence-permit route tied to work, family, retirement or study. Routes can take months, so start early: gather passports, birth/civil-status documents, good-conduct certificates and income evidence while you're still in your current country, apostille or legalise anything that needs it, and carry the originals in your hand luggage rather than your shipping container.