1. Too tight game with a short stack
Take the shortstack position as a situation when you have nothing to lose. Do not play recklessly and do not lose hope, and instead raise your level of aggression to the maximum, but still logically consider what kind of blows will be for you + EV. Whatever you do, do not leave your place as a weakling!
2. Too aggressive game with a large stack
A large stack is not the reason to go crazy - it's an excellent opportunity to use justified aggression to obtain chips, exposing yourself to only a minimal risk.