People 40+, what’s something you kept telling yourself “I’ve got plenty of time” for in your 20s, but eventually wished you hadn’t waited on?

**I’m in my 20s right now, and I feel like we always tell ourselves “there’s plenty of time” — whether it’s getting serious about our career, saving money, taking care of our health, traveling, finding the right person, or spending more time with family. For those of you who are 40+, what’s something you genuinely thought you had plenty of time for but later realized you didn’t?**