I know where you're coming from. I just turned thirty, and haven't done nearly as much as I wish I had. For me, I mostly just wish I had worked harder, but also

I know where you're coming from. I just turned thirty, and haven't done nearly as much as I wish I had. For me, I mostly just wish I had worked harder, but also some of the social/romantic things you mentioned. My sole qualification for posting is that I successfully avoided feeling awful at the transition to 30. This is not really about "turning 30". It's about regrets. I won't pretend these are invalid regrets; "we all make mistakes", while true, is not a very good excuse for any particular mistake, no matter what anyone says who is trying to cheer you up. But regrets are a universal problem. There's only one thing you can really do about them: try to do better in the future. Think carefully about what you could have done differently with the information you had then, but don't dwell on them. That will just turn into another regret down the road. Make a plan. Execute. "Just do it" is another awful cliche, but has a large kernel of truth to it. Even if you know this intellectually, the tricky part is getting yourself to believe it, down in your gut where you actually act on it day to day. If I ever figure out the easy way to do this, I'll write a book, but I don't think there is one. Thinking hard about what you want from life will probably help. That's the closest to advice I can do.