After practice I usually play lowcount, that way it forces me to hit only the corner pins in case you want/need to practice those pins, the score is the next.
If you throw it to the gutter on the first shot it counts as a strike, if you do it in the second shot, it counts as a spare, pretty simple, pretty difficult.
Also, you can play like frame 1, just get 1 pin, frame 2, 2 pins and so on.
hope this helps