Negative thoughts and feelings harm us more than the person or persons on whom it is directed.
The best way to keep negative thoughts and feelings is to engage in hobbies like gardening, reading, music, writing, dancing etc.
Key to a healthy mind is realizing that happiness does not reside outside.
Positive thoughts, acceptance and contentment are good food for the mind.
Observing the mind and getting mastery over it is the best method to have a healthy mind.