Eliminate mistakes wherever we can. And a game can always be more well-rounded.
I think this says it all. The two ball is a good idea because it means those shots are in the bag.
My errors and scores add up to mistakes. Bad drives, skilled shanks, etc.
I think once you figure out the drills to do and the ways to fox your game, doesn't have to be lessons you could succeed. Ultimately, play your next round and count how many holes you had a mistake or miscue