There are many small daily problems I can't imagine addressing with math, and most people just cruise on intuition most of the time. Where we set the threshold for using math concepts seems to vary a lot with cognitive ability and our willingness to break out the graphing calculator when it might be of use.

It might be useful to lay down some psychological triggers so that we are reminded to be rational in situations where we too often operate intuitively. Conversely, a systematic account of things that are too trivial to rationalize and best left to our unconscious would be helpful. I'm not sure either sort of rule would be generalizable beyond the individual mind.