Is the act of moving, eating, doing, and living craving itself?

I've been practicing Vipassana and reading "The Art of Living" by S.N Goenka. My questions is, I have obligations. When I wake up in the morning I have a thought to go to the bathroom and brush my teeth. Then I follow with that thought and perform the actions. How is this different from me craving that action? If I simply observe the thought of brushing my teeth, and mentally note "thoughts", it will help the thought fade but now I do not accomplish anything in my life. How do I know what thoughts must be left to "fade" and what thoughts I must act on? If I'm acting on a thought, isn't that due to aversion/craving? Where do you draw the line?