What (and where) was your light source, or did you have more than one? Flash and window light with the sun shining outside, maybe?
Corinna, I am glad you liked them. I have attached a schematic of what I recall was the final setup I ended up with. I was in the basement with some of the lights (and TV) on but it was pretty dark. You can consider the majority of the light was from a single flash with no diffuser. I hope the drawing helps.
The last couple posted, I had a work light on so I can see what I was doing while I was experimenting... but its essentially the same.
PS> As for focus, I was shooting at smaller apertures to get a bit more DOF for error. I had a lead toy soldier (old one..) that I would sink and position in such the drops were falling on his head. I then manually focused on the toy soldier's head just above the water line.