With the gravy you put the milk in first, maybe some butter and get it warm. Salt it, pepper it and then start addin' your flour a little at a time, stirring it the whole time you're addin'. Once you've got it thick enough you season it up how you like it.
The biscuits take a little more doin'. I can show you if you want. [Mostly because the mun has no idea how you make biscuits from scratch]