Spirit gave good advice, to control or bend a mind one first needs a strong mind which can overpower the other mind, think of it almost like wrestling a mind on a subtle level so the person doesn't realise it and then in doing so effecting their free will, but always remember that messing with freewill does carry a price which will come back at you again in time, rather learn how to influence in a postive manner and still get your way, thus you help the others and yourself.
Mind control in my world is forbidden of course it can be done but there is always a price for such things. Like say, being destroyed, imprisoned, loosing your powers, or being exiled into a world that you will never like. That's why we sorcerers use influencing spells to influence the person instead of tampering the natural order/design of free will.
One, none of those things will happen unless you believe they will. Mind control would probably be a very advanced form of telepathy, or rather some similar as telepathy is simply communication between two minds. Unfortunately since I have never been interested in controlling the minds of others like that I have never really worked towards that goal, I prefer using words to convince them that regardless of whether or not they know it to be true what they really want to do is what I want them to do.