Io3, I agree it is also a good idea to get into the habit of not feeling forced into agreeing to anything but getting into the habit of saying “I will give that some thought and get back to you” because sometimes when feeling pressured we can agree to things that we would not ordinarily agree to but then feel that if we negate we cause more harm than good. So by not saying yes or no, but actually saying you will think about it and then get back to them about it and not just forgetting about it, you actually maintain control over the situation. You also get the time and space to choose your battles wisely and not just because you are giving in to pressure and shouting.
So if you are pressured for something that you don’t want to do, and you have the time to think about it, you might come back with “I gave it some thought and I don’t feel comfortable just getting that for you because you know how I feel about that, but I don’t have a problem respecting you enough to allow you to earn the privilege to get that for yourself, so what do you think you could do to earn that?”
In that way you are showing him that you respect him enough to allow him to make his own choice, and that you feel he is responsible enough to earn a privilege. But that since you love HIM and not his choices, you will allow him to earn that privilege for himself. So if he can earn that privilege, it definitely shows love and acceptance of HIM, without negating his right to make choices for himself even if you don’t approve of them. It also will build his self-esteem and confidence because it allows him to be productive.