Tourists in Amsterdam: serve yourselves

I frequently host friends and family visiting Amsterdam so I've started to compile some useful resources for tourist visiting Amsterdam. So far I have the following. Please share your recommendations...

City Guide and events: https://www.iamsterdam.com/

Buying tickets for Van Gogh's museum: https://www.vangoghmuseum.nl/

Free audio guide for Van Gogh's museum: https://enjoygreatart.com/

Buying tickets for the Rijks Museum https://www.rijksmuseum.nl/