Live and learn
Yup.
I mean, I've read about these mistakes... you know, having the
camera set for some shoot with one specific set of properties,
forgetting about it, and shoot something different a few days
later, with very different lighting, and discovering how bad the
picture came out.
And I've read of all these photographers that have this routine of
checking and setting their camera(s) before every new shoot... and
it seems that reading about this so damn many times, one might
learn from it.
But no.
I made that same mistake, when taking a picture for yesterday's daily shoot. It was set to ISO 800 and white balance for flash, which wasn't quite optimal for taking a picture of the sky in sunlight...
Live and learn, they say. Maybe I've learned to check the settings of the camera before the next new shoot. Here's hoping.