Incorporate things like roads, streams, shorelines, railway lines, or even railings, into your images. These are referred to as lead lines and are a great way to capture the way that a viewer is going to look at your photo. They will lead your viewer's eyes through the scenes of your photos.
One of the best ways for you to learn about photography is to study examples of how to hold your camera and work your subject during photo shoots. In addition, you can talk to someone who has been in photography for a long time to gain valuable insight on your craft.
A much simpler way to freeze the water drop with one flash. This video shows all the gear and camera setting needed to accomplish the task.