Not technology related but interesting and worth reading.
Long ago, Charles Darwin theorized that facial expressions actually determine your mental state. Several studies show that he was right on the money. A Penn State University study found that people who flash their pearly whites not only spread the love and appear more “happy and courteous,” but they also appear to be more competent in the eyes of others. When you appear more competent and courteous, you get more business.
I am a fan of the “Lioness” Katherine Eitel. The blog post linked above is part of her Monday Morning Stretch series.