The exact same thing just happened to me recently after a 10+ year break. Ranking systems seem to have shifted a little since I last played, but I feel like I'm

The exact same thing just happened to me recently after a 10+ year break. Ranking systems seem to have shifted a little since I last played, but I feel like I'm playing easily 3-5 kyu better than I used to at my previous peak. I think this is a different process, though. My sense is that increased wisdom transfers very well to improvement in go. What is making me better is a better ability to prioritise, make judgments and tradeoffs, and manage risk, learned from the real world. This is nice but orthogonal to the techniques for improvement on a single skill. During the period I first started playing, I did a little exercise where I looked at the advice people give on how to get stronger. What I found was that while you'll hear all kinds of stuff thrown around, when you look specifically at what the very strongest players (go professionals) say, you get a super consistent answer: (1) do as much tsumego as you can stomach, and (2) play as many teaching games as you can with the strongest players you can find. This directly translates to drill and scrimmage!