I did the exact opposite. I hung onto a bunch of paper TicketMaster stubs for decades because I was indecisive about throwing them away or hanging on to them. The "sentimental baggage" surrounding those tickets distorted my thinking and attached too much importance too them.
And then I read about de-cluttering your life advice from minimalists and learned of a good hack that worked for me: Just take photos of your mementos and then throw them away.
That was the psychological breakthrough I needed. I digitally scanned all my old Ticketmaster stubs as *.tif files and then threw them out. I also had a bunch of useless novelty coffee mugs (free gifts from trade shows or past employers). I just took digital photographs of each mug and then gave them away at Goodwill. Preserving them digitally helped me let go of the physical objects. Everyone once in a while, I might revisit my digital scans of the concert tickets on my computer monitor and that's good enough for me.
Reading passages like hers reminds me that that some people need those physical mementos and some don't. In a similar vein, a lot of people like physical media like DVDs and CDs. In contrast, I got rid of my entire physical library of thousands of discs. I don't miss the space they took up at all.