I’ve been experimenting with “alternate nostril breathing.” Breathe in through the left nostril, 75. Breathe out through the left nostril, 74. Breathe in through the left nostril, 73. Breathe out through the nostril, 72. Continue this process until you reach zero. If my mind wanders, I pick back up at 75. Interestingly, I haven’t been able to get from 75 to zero. I’ll keep practicing.