We all have routines. Not only the activity itself is routine but the thoughts that accompany it as well. Thoughts lead to emotional reactions and different feelings combine to make up our moods. So if we pay attention to the thoughts we have each time we do routine tasks we have the chance to adjust what we think repeatedly. If you want to be more grateful, savour more and appreciate the good focus yourself while you are brushing your teeth. In the beginning it requires effort but after a while just seeing a tooth brush will remind you of positive thoughts and feelings. Give it a try.