I thought about 2 way shots and leaving the CB bad should something miss, that It usually just works that way. Over time it becomes almost subconscious. I get "rolls" more than anybody I know but I spent a few years heavily focused on 2 way shots.
EDIT: It also amazes me that many people do not see caroms/billiards and the like. They think it's luck and I let them continue to believe it. There's tons of things you can do with 2 way shots... put the CB in a particular place and take a 15% 3 rail bank or something, 15% of the time it works, the other times the CB is safe anyway.
It's hard to explain but sometimes you just have a good feeling about a particular shot and it works. Protect the CB and roll the dice.