It seems to me that what we do or not do while we are sitting in Zazen is not different from what we should do when we are awake. When a random thoguht comes to mind during practice I do not bother with it, but when the same random thought comes to mind when I am awake it suddently feels more important, and it generates several other seemingly important thoughts. The problem is that some of these thoughts we have throughout the day are important indeed, while others (most of them I guess) are clearly brain farts. My question to you is...how do you differentiate between a spontaneous thought (that then leads to "right" action) and redundant usless thinking? How do you apply Zazen to your life?