If you love something, take a picture of it. Or at least write about it in a journal or note. It’s important to capture the things that make you happy so that you know what you want your life to be filled with.
On the other hand, if taking a picture means missing out on the actual spectacle (looking at you, gig crowds recording bands for 90 minutes), it’s not worth it. Find the balance and you’ll end up with a ton of memories and a log of all the best moments.