Look around for places where something seems incompetently run, or hopelessly inept, and where some part of you thinks you can do better.
One question that comes to mind for me is how do you differentiate this situation from unilateral action on bad things? There's a part of me that wants to uninformative like "oh yeah, just do the good type of unilateral action but not the bad type of unilateral action. Easy!"
But my guess is that reality isn't quite as unforgiving, and there are probably at least some good heuristics to reduce the risk of bad unilateral actions. But if so, what are they?
I don't operate with this mindset frequently, but thinking back to some of the highest impact things I've done I'm realizing now that I did those things because I had this attitude. So I'm inclined to think it's good advice.