I'm always told in my work place that sending thank you email is a good manner, so I have made it a habit to send ones at work. However, when it comes to my private life, I seldom send one. There are several situation in which I may want to send one, a meeting for adults with developmental disorder, and a setting with my mentor. Last week I had both occasions, so even it is a little to bit, sending one may give the participants pleasant surprise, and it may help me reinforcing the habit of sending a thank you email after I meet someone.