I'm currently using a MacGregor cart bag with six way divider (3 full length) and divide this way when looking from above, behind the cart:
Top Left: D, 3W,
Top Right: 3h, 4h, 5W
Middle Left: 4i, 5i, 6i
Middle Right: 7i, 8i, 9i
Lower Left: LW, PW
Lower Right: Putter, SW
Too many clubs. I alternate my 5W and 4h since I rarely use either and get the same result from both (of course it's dependent on the lie). I always put my clubs into the divider they came from.
The real question is, how many of you put the covers back on your clubs when you put them in the bag after each shot? How about just the driver and/or wood covers each time? Putter?