continue doing that left and right thing
as you get good at that, speed up how quickly you move your mouse
it takes a lot of practive but soon you'll be good!
and you don't need a high sensitivity to do it either
i use 3.8 and can do it very very well. (it took me a while to get good though

)
as you get better you'll notice you're moving around much more quickly and are much harder to hit.
have patience and remember to KEEP IT
SLOW AND SMOOTH! no jagged movements!
good luck everyone!