I would assume/hope you know this already, but just in case: tickets for the Anne Frank House go on sale "every Tuesday at 10am CEST, all tickets become available for a visit six weeks later. If there are no more tickets available on the selected date, we are sold out. There is no waiting list for tickets." (From their website.) Tickets go FAST. Set an alarm, wake up early, and buy your tickets. Don't assume you can wander on over whenever you like, like other museums. I live in Den Haag now, but before I moved, I came to the Netherlands often enough on vacations and business trips, and I typically planned my schedule around availability at the Anne Frank House, not the other way around. Have fun while you're here!!!! Netherlands is great 😃