I've had a bit of a long day today, and did sound for two different productions, finally getting to bed after midnight. I had to snap some photos late in the second film, and was already making some dumb mistakes which resulted in "acceptable" photos. Not the best by far, but it was just to document what was done instead of having to be technically excellent.
It got me thinking, what are some good tips after a long day where you're starting to make dumb mistakes like not checking ISO, or aperture? What's a good way of remembering to pay attention to your exposure triangle?