I read on quora - posted by a dentist - that one should brush one's teeth first thing in the morning, and there was a lengthy explanation that had to do with acid and enamel and if anybody is interested in the rationale, I can find the post and post a link. So I started doing it. And I timed myself - it turned out, I was not brushing my teeth for the full two minutes. I thought I had an idea of how long two minutes last, but no. So now I am taking the toothbrush with the toothpaste on it to the kitchen, set my microwave timer for 2 mins, and brush. The burst of freshness wakes me up better than coffee can, and knowing that I already have accomplished a major hygiene step (mouth health impacts a lot of things, including heart health, so it is not cosmetic only) so early in the day makes me more likely to take care of hygiene throughout the day. Getting into this habit sort of killed two birds at once, when I least expected it.