Macro water drops are something that can be done around the house without really needing to do much setup. For these shots I just filled my kitchen sink and let the tap drip.
Nikon D90 1/200 sec. f/16 ISO-160 at 105mm
Flash is important as it will help freeze the motion and create a crisp sharp image. I liked the monochrome look for these ones as it had the appearance of liquid metal.
Nikon D90 1/200 sec. f/13 ISO-160 at 105mm