There's no method to make you good at this quickly, but here's one to make you improve your concentration.

They say that people's ability to concentrate increases when they're under pressure.

And besides...

...I have complete trust in you.

Won't you believe in me, Miss Sakuya?

Okay.

I believe in you too, Meiling!

Meiling fully believes in me.... It'll be all right! I'll make sure not to miss this time...

Hehe, it's turning out great.

She'll probably miss by a mile at first, but this will still be a good learning experience for her.