Make some quiet personal time a requirement for every day. Laugh about something every day. Steve Martin takes five minutes every morning to laugh in the mirror. The act of laughter releases beneficial chemicals and makes us feel better. Teaching can be extremely stressful, but it is also filled with opportunities for laughter.
Successful people are always able to find humour, even in the most serious aspects of life.
Learn to be still. The average teacher spends little time in contemplation and quiet thought. Ten minutes of peace and reflection on self can be highly therapeutic. Every student's and colleague's voice you hear has wisdom. Teachers who listen well are often popular and listened to when they speak.