Photo textures are a great way to add realism and interest to a 3D work, there are many places online to get free textures or stock photography, but sometimes the best way to get texture pictures is to take them yourself. Taking the image yourself also gives you legal rights over the image, just make sure it isn't a picture of a sculpture or some other copyrighted work such as a drawing or printed pattern or such.
It might be a good idea to build up a library of textures and images for you to use so that you don't have to go take pictures every time you want to use some textures, take a look around your own property and snap pictures of anything that might be of use, rusty pipes, concrete, grass, wood [just make sure it isn't a printed pattern], dirt or anything else that could be used for 3D work.
You can use macro mode [the tulip icon usually] to take close up shots:
Thanks for reading!
Feel free to use these images for your own blog or website, just be sure to link back, thanks!