My One Thing yesterday was that I figured out how to log into my 401k account, checked the expense ratios, and moved money/changed some of my future contributions from an international fund with an expense ratio of 0.76% AND poor performance to a Vanguard international fund with an expense ratio of 0.1% and better performance. Unfortunately I have no illusions that that means I know how to invest, just that I have a tiny bit of knowledge. Also I’d had the same elections since I set up this account almost 12 years ago, so it would have been nice to have done this a decade ago. :(