I have found something fun to do in Photoshop and other software packages, Abstract Photography.

First you have to work an image, get an idea of what you want to do with it.  You can do this in Photoshop or other software or in camera.  Camera movement during exposure is one way to do it in camera.  I prefer the Photoshop way of doing it.  There are so many choices of what you can end up with, it is almost endless.  This is one of my favorite.  It started out as a sunflower with a little sky.