1. Take the time you have Museums are exhausting. I'm a museum person and the stimulation tires me out. So take the time you have and spend time with the works that you like. Viewing art should be a fun experience -- not a sprint to see every Picasso, Monet and Degas until your eyes bleed.
Do you have an hour? Great. Take advantage of a pay-what-you-can day and spend some time in one collection. Or even one gallery. Engage with the art in the way you want to engage. That means if you want to take a photo, take it. Take a selfie (if the museum allows it) or photo bomb the work.