Be kind, considerate and courteous.
But also be shrewd and know when to be tough and courageous.
This is the mark of a well-defined character and you will surely command respect.
It is most useful to read books on friendliness and enhancing relationships by being a good listener, showing others sincere appreciation and refining other interpersonal skills.
But, to truly succeed, one must also recognize that worldly wisdom and shrewdness and essential skills to foster.
Become an expert in human psychology and be able to read the essence of people.
Never be taken advantage of and be aware of the politics around you.
Stay above petty gossiping and office politics but appreciate that they indeed exist and know what goes on behind your back.
Every great leader does.