Not really - diaries and planners from your youth are exactly the kinds of things you don’t throw away, ever. I sure haven’t.
Well, I did have a few things I've kept since my high school days, and even earlier - like my 3rd grade report card.
Unfortunately, the cat whom I inherited a few months ago (long story) decided to pee on all those things.
So they're history now, probably polluting the Atlantic ocean.