Today, set an alarm to ring 10 times in your day. Ask yourself the question above and answer it with: No; yes, something pleasant; yes, something neutral; or yes, something unpleasant. Keep a record of your answers for the day. Then, take time to read the original paper A wondering mind is an unhappy mind and read about the results of their experiment. You can also look at this easy digest of the implications of this experiment. It may motivate you to find (and stay with) some kind of mind training that allows you to choose when your mind wonders a little more often.