If you need to deal with difficult people then the below given ways will surely prove to be helpful.
First of all one should have control over their emotional response while dealing with difficult people as people who are negative are influenced by those who react in a strong and a positive manner. Another way to deal is by getting to the core as difficult people use various tactics while communicating and discussing an issue is one of them. If conversation is broken down it can solve the purpose.
Being calm and getting the help from the people who have been in similar situations also proves to be helpful in dealing with difficult people. Meditation helps to control emotions, gives more patience and helps to grow as an individual so as to deal with difficult people.
Respect the other person if you wish to get respect for yourself and also act normally without showing emotions of anger while dealing with people who are difficult. Communicating well with these people also helps to a great extent.
Finally if none of the above ways works while dealing with difficult people then the last option is to ignore the person and to just avoid them.