The verb MIND is followed by :
* a noun : ex : I don't mind chocolate from time to time.
* -ing form : ex : Would you mind my (me) singing ?
* a clause : ex : I don't mind if you don't talk to me ! = it doesn't matter ...
2) mind is most often used in the interrogative and negative forms :
ex : She doesn't mind staying up late.
ex : Do you mind my smoking ? ( me smoking = less formal ) = smoking and ready to put out his cigarette = Do you dislike the fact I'm smoking ?
ex: Do you mind if I smoke ? The person will light a cigarette if permission is given.
3) mind is also used in the imperative + a clause (often a negative one) : = Be careful ! (This expression is used in the UK.)
ex : Mind you don't fall ! ; Mind you don't bang your head ! Mind the step !
ex : Mind your own business !
4) mind is also used to express polite requests :
ex : Would you mind switching on the light for me, please?
5) An expression : Mind you ... is used to add something to what you have just said, especially to make it less strong. = It's mostly spoken English and quite informal.
ex : The meal was expensive ... Mind you, it was delicious !
Don't confuse: 'I dont mind ...' and 'I don't care...' (= I'm not interested !)