on the good side of (someone)
In the position of being pleasing to someone; in someone's good favor or graces. I know it can be hard to stay on the good side of the boss because of how fickle he is. I suggest you get on the good side of the board if you want your proposal to have any chance of passing.
*on the good side of someone
and *on someone's good sideFig. in someone's favor. (*Typically: be ~; get ~.) I tried to get on the good side of the teacher, but that teacher has no good side. First of all, don't try to get on the boss's good side.