This is if your on a tour. I got it off my pan-flit from Cameron University
Turn off electronic devices and pay attention to the speaker. It's common courtesy. Don't take phone calls, text, or anything else that distracts others around you.
Of course you want to take photos, but respect others' desire to do the same or not; don't shove people aside to get your shot and keep up with the tour. Especially don't use an iPad to do that, since it effectively blocks the view of anyone behind you. And for God's sake, no selfie sticks!
Don't film the whole thing; you should be in the moment, not in the future. You'll just annoy people and you'll never watch it again anyway. Be selective and photograph unusual campus sites or those of particular interest to you for later comparison. Taking notes on paper is a refreshingly retro way to record data.
By your second tour you will have heard just about the entire repertoire of tour guide jokes, including the one about walking backwards, the dining hall food, and so on. You will also witness the tour guide saying hello to a student walking nearby in an effort to demonstrate how friendly the campus is. Please give each guide a courtesy laugh anyway.
Some schools train tour guides extensively, others don't. The former tend to be robotic but knowledgeable, the latter sometimes too free-form. Tour guides are guaranteed to love their school, but don't base your opinion of the institution entirely on the tour guide's presentation or how hot (or not) he or she is. (I've spoken with students who remember their guides more than the college.) They may occasionally reveal something the admission office would prefer you not know, like the strength of the party scene, the ease of cutting classes, and so on, but you should take these revelations with a grain of salt.
Be considerate of your guide and fellow travelers as you walk around campus. Avoid side conversations, lagging behind, or commentary about how things have gone downhill since you were there.
Don't put the guide on the spot. He or she may have closed down a huge kegger the night before, but you don't need to ask pointed questions about alcohol and drug consumption on campus or wring admissions about hooking up, coed dorms and cheating on the tour. If the school has been in the news recently, keep questions about that confined to, "How is the school taking it?" Don't turn the tour into a news conference.