Protip: you can come in to Brussels through Amsterdam. Passport control line in AMS is negligible (at least at 5AM, though I'm sure it's not  too bad at other times either), and it's only a 2h train ride straight from the AMS airport to Brussels.

That's a solid tip! Amsterdam's early-morning efficiency never disappoints. Plus, the train ride to Brussels offers some amazing views and a chance to unwind before hitting the city. It’s always good to have a backup plan, especially when it can save time and hassle. Thanks for sharing!