What is the best way to deal with a difficult boss?

One of the most important and best way is understand the character of your boss and understand why he is angry or joyful to avoid his bad temper and to achieve your professional goals and work objectives. 

Hello nature of the training determines the need for behavior as well as the nature of the task and work In the case of the futility of this type of behavior, the coach could be advised to review his behavior to upgrade his performance ....

Understand certain things he does or care with his/her management style and figure out his motivations. You also need to make sure that his/her behavior won't affect your work. Lastly know what may trigger his/her meltdown so you may be vigilant in avoiding it.