If you are taking my stencil class at journalfest, just some ideas for stencil designs.
Photos for stencils- look for bold, simple strong lines and shapes. You can make a stencil design from almost any image. For photos you can start with a black and white or convert a photo over on your computer. This is a photo I took out of a book, it was already black and white, I made it mostly black on my computer, but if you have a simple strong image you don't have to do that. You will be tracing the images over a transparency , so you can draw what parts of the image you want. For other stencils you can look for things that have a strong silhouette. You can find design ideas anywhere, shopping bags, wrapping paper, magazines, anything. I will have stuff in class to play with, so don't worry to much about an image, unless you have something personal you want to bring.