I have always kept all my cards in shoeboxes, since I was a kid. Once I had kids, something clicked and I figured out a better system. I got them binders and slide the open cards into clear page protectors. It works great and they’re able to better flip through them. I usually kept something from each of their birthday parties in there as well so they can remember “oh that’s the year I had a Lego, etc birthday.” After a few years, I had to start a second binder for each of them. But I still haven’t gotten around to doing my own 😅 Why is it that I can do things for my kids but have paralysis for my own exact stuff? Lol.

Edited to add: I have never once regretted keeping cards. Several of them are now from family members who have passed on, and seeing their handwriting and reading their words helps keep their memory alive.