Maybe it's just me, but in an endgame where (for example) it's just kings and a bunch of pawns, even a two pawn advantage is easy for me to lose—I pick the wron

Maybe it's just me, but in an endgame where (for example) it's just kings and a bunch of pawns, even a two pawn advantage is easy for me to lose—I pick the wrong pawn island to support with my king, and I've already lost. Knowing good heuristics in these sorts of situations is something that takes active study IME—"don't blunder pieces" is not sufficient, at least for me.