I have been changing sensitivity and mouseaccel since playing q3.. but i can't find appropriate setting value.

how do you set sensitivity and mouseaccel?

the steps that I think for setting sensitivity & mouseaccel is

1st. find sensitivity (what is standard for setting sensivity value?)
2nd. find mouseaccel (Also, what is standard?)

I saw configs of top players who use mouseaccel (cooller, jibo...), but I can't find how they find their setting values..

I really want you to help me..