Maybe, if it's an Ivy League school, I could see wearing a class ring. (Certainly not a high school ring. And, don't get me started about the losers who leave their graduation tassles hanging from the rear view mirror well into their 20's (or later.)
My parents still have my high school senior pictures. After that point, no one really cares about pictures commemorating other occasions, except for wedding photos, and 50th anniversary photos.
And, to get ready for graduation - I didn't do anything. I didn't attend my graduation ceremony. (Why bother paying for a cap and gown only to sit in some hot sweaty environment, listen to some speakers that no one is going to remember what they said 1 year from now, and wait forever as person after person walks across the stage. I have more exciting things to do. Ditto my son's graduation - he didn't go to his college graduation; he was too busy working (already landed a good job) to want to bother coming back for the weekend. My wife's 3rd degree - her university made graduation mandatory. Borrrrrrrring.
Hell, at my high school, the principal one year said that "if you don't put in for the time you spend doing the sound and lights for graduation, I'll put in for it for you." "But, you don't understand. Instead of sitting in the first 3 rows with the rest of the teachers, I'm in the back. As soon as you get to the boring part about scholarships and such, I'm up in the faculty lounge watching tv. Then, when you're giving out the diplomas one by one, I'm back to the lounge for a while. So, by volunteering to work, everyone thinks I'm there, everyone remembers that I was there, and I'm not there. Win win for everyone."