Share 'How to set up your bag? Disc selection, etc.?'

Hello, I have found some great threads on here about picking discs to throw. But, does anyone have any advice on how to set up their bag? How many drivers, mid ranges, putters, etc to carry? Right now I have been going crazy buying discs to try...have 19 total right now with innova and vibram in my bag. But, kind of shooting in the dark right now.   Thanks!