Set yuor camera to Burst and hope you get lucky. And If your Camera doesnt have a burst, push the button half way down before you take the picture.
YOu have to leanr your camera and time it just right. I took 300 shots with my camera of water drops....around 100 were what I wanted, and 30 or 40 were usuable.
(by the way, yours turned out nice...even though it isnt what you wanted)
Here is a picture of a basic setup (if you go the persons profile, and click on browse gallery, he has a bunch of pictures of water drops)
I looked for the instructional one of the people has, but they must have deleted it because I dont see it...google it!