Been a while now, but I used to shoot some skeet, as practice for upland bird hunting.
I think Skeet is exactly right- what I used to tell myself when I was having a lousy round is: 'stop thinking!' When I tried calculating lead and all that scientific crud, I couldn't hit my own foot. As soon as I quit thinking, and just concentrated on shooting the bird, I'd get better.
BTW, if you get to the point where you think you're good, try a few rounds with the gun at port arms until you see the bird- good practice for hunting. Shooting from station #8 that way will separate the quick from the slow.
Skeet's right about getting an open choke, too. I used a bird gun choked improved and modified- before the days of choke tubes. If I'd had choke tubes, I'd have used cylinder and improved, which is about what skeet #1 and skeet #2 chokes are.