The thinking starts immediately on move one. Until the game crystallizes into a normal looking chess position, evaluation is a much harder task; the difficulty stems from the fact that there are so many more variables to keep in mind, and they’re in a less fixed state. It's so tempting to just play in moves, of course with some ideas, but not necessarily a grand construction for the whole position. You need to fight for the center. It is definitely a challenge to avoid poorly placed pieces. Black should generally avoid symmetry. [...] There will definitely be cases where symmetry is fine or even the best option, but in many positions, Black can do better by forging his own path. Bishops in the center of the board (i.e., d1 or e1) are not actually "undeveloped" pieces and I don’t have to give them first priority in development ... of course, knights in the corners tend to come out early. I found it hard to find the right balance; I tended to play either too passively or too aggressively.
Some of Krush's advice seems obvious ('thinking starts on move one'; 'need to fight for the center'), some not at all obvious ('Black should generally avoid symmetry'; 'Bishops [that start] in the center are not "undeveloped"'). I'll keep her tips in mind for future posts.