I know that even as I sit three feet away from a person who just sent me an email, there is always time for me together write or say the words “thank you” via email or my actual mouth, every time they do good work. There is no excuse not to say it. It is not wrong to praise. Saying “thank you” also opens up the possibility for giving feedback (both positive and negative) on projects, because the person feels acknowledged and valued. I seriously want to make a study of saying it as much as possible as a boss.