If I could've given advice to my younger self, one thing I would say is, "Don't hang onto so many things; don't acquire so much. It will only weigh you down."
I've reached a point in my life when I am much more willing to let things go. In the past couple of years, I think I have released more than I've acquired, reversing a lifelong trend of increasing accumulation. But I have more to do.
It isn't just material possessions that I tend to hang onto. I have always found good-byes difficult. Every job, apartment, relationship--even if I really wanted to move on, there was always at least a pang of regret in there somewhere. Heck, when I closed a bank account that I'd had for 25 years (through multiple mergers and name changes on the bank's part), it was bittersweet. That was the first account I'd opened upon moving back to Philadelphia and settling in at my first post-university full-time job.
Maybe it was just that part of my life, my younger self, that I didn't want to abandon. Because in reality, I had no real "relationship" with that bank. They were paying me almost no interest, and they had just instituted new fees that meant I would be losing money by keeping an account there. Despite the commercials they continually run about how they're all about people, I was just a set of numbers to them.
And I moved on, and I'm fine. But it just shows how far I travel emotionally when I let anything go. Everything in this world is temporary, but that is one of the hardest ideas to accept.