The key is to get the exposure correct.
Don't use "AUTO" for exposure, brightness or contrast.
1) Set exposure to one notch above where you see bad scan lines (usually "7" with most config utilities)
2) Set contrast to right before the black of the monitor starts lightening up.
3) Set brightness so light colors are not washed out.
4) Slightly tweak as needed.
Your on your own after that.
I'm not supposed to helping with webcam setup anyway... But since this is for everyone, technically Eric can't yell at me.
Don't bother asking any webcam config questions. I wont answer them. I've said too much already......