If you have a DLSR with a detachable lens you can create microscopic images.
Open images in Photoshop and try the following things:
John Baldessari is a contemporary artist, who uses photography, text, collage and paint to create thought provoking images. His book "Throwing three balls in the air to get a straight line" was a series of photographs documenting his attempts to throw three balls in the air and capture them when in a line (also see: http://abtarts.weebly.com/blog/john-baldessarri).
We spend a lot of time focusing on what we are photographing but sometimes the power of photography is to make the viewer want to know what is happening outside of the frame. This sense of intrigue will persuade the viewer to return to that image again and again.
Create a series of images that suggests the presence of something that is out of the frame.