The skills you need guide to interpersonal skills

It is therefore important to understand and be able to use all these 
strategies when necessary, and to combine them fluently.
ETHICAL PERSUASION
As you develop your persuasion skills, it is important to remember that you 
should only use them 
ethically
. You should never try to persuade people to 
do anything illegal, or that is actively against their interests, and in yours.
Of course there will be times when you need to persuade people to do 
something challenging, or that is difficult for them, because it is in the best 
interests of the organisation or the wider group.
Persuading others of the importance of managing climate change is a good 
example of this, as is getting buy-in to a major change initiative that will 
result in some redundancies but will make the organisation fit for purpose 
into the future. This is not unethical, but you do need to find a balance 
between individual and group needs.

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2.
ADVANCED COMMUNICATION SKILLS
ROBERT CIALDINI’S INFLUENCE WEAPONS
Robert Cialdini’s book, 
Influence: The Psychology of Persuasion
, sets out six 
‘influence weapons’, which can be deployed to help you to persuade others. 
This makes persuasion sound like a battle or war, which may be less than entirely 
helpful (creating a win–win situation is always going to be more effective).
However, these six ideas may be a useful way of thinking through your options in 
any particular situation.
Reciprocity
This might be thought of as ‘you scratch my back, I’ll scratch yours’.
In other words, if you do this favour for me now, then I will do one for you later. Of 
course, you will need to be prepared to return the favour later. Failure to do so is 
likely to limit your ability to use this tactic in future.