I think "to build your house brick by boring brick" means something like accepting reality, like, you need to build your house (or life) with real things and not with dreams or whatever. And that's surely "boring" but you need to stick to it, or else "the wolf's gonna blowing it down", meaning that it won't last. Basically, I think she's telling herself to wake up, bury her fairytale world and come back to reality.