[skishmonkey72]

Keep your eyes focused on the top arrows and use your peripheral vision to see the other arrows that are coming up. If your eyes are focused at the top it should be much easier to have better PA. Also, use a speed mod. Preferably the fastest you can handle. I would advise gradually changing it, starting with 1.25, then 1.5, then 1.75 if you need it. One thing that's helping me right now is playing hard and easy and medium difficulty songs, and focusing purely on PA, not caring about combos. I've done this for about a week, now I'm getting better PA whether I focus purely on PA or not.

I won't advise for or against screen-shrinking because I haven't tried it for more than a week.