My original ID expired a couple of years ago but for some reason my alma mater sent me a brand new one that’s valid through 2017 (thanks, guys!). Despite the fact that I am 19 in my photo and it looks nothing like me, no one ever says anything. Most people who see a lot of theatre know this already, but definitely always keep your college/grad school/whatever school student ID handy. I never understand it when people don’t have it on them.
Especially when you’re a tourist and doing lots of touristy things abroad.
I mean, really. I must’ve saved at least $100 by using my student ID to get into various castles/museums/etc during my trip.
Just hold onto your ID. Keep it in your wallet. That’s really it.