Abandoning the idea of "what is normal?" for a moment (we can define it, possibly, as the land of "not depressed"), I'm finding myself thinking the following on a fairly regular basis:
"So, this is what a cold feels like, you know, to normal people" (just a cold, not an indicator of moral failings or a harbinger of doom because I have to stay in bed more than I'd like).
"So, normal people sometimes don't keep their kitchen clean when they have a cold because it takes all of their energy to get done what absolutely needs to get done" (not, I am committing a deadly sin of sloth, and therefore, the rest of my life will fall apart and I'll be drooling on the floor before you know it).
Just for example.
I think catastrophizing is a pretty common technique for us bipolar girls. It's a learning process to know that sometimes, a cold is just a bad cold (and miserable, but not, you know, all defining of my character and such).