Here is an article by Marr Parr about photographing ordinary objects on the Guardian website . Below is an excerpt:
I want to put forward a case for taking more seriously the everyday object, we should appreciate those objects that are so familiar we usually don't notice them. Take the scarecrow, a wonderful example of outsider art, and made with a real purpose. If you were to say to their farmer creators that they were sculptures, they would look at you as if you were mad. However if you take photos of them in splendid isolation, the results are both compelling and surreal.
There are two categories of everyday objects: those that are constantly changing in terms of design, and those that are reassuringly constant. In the former category, take something as simple as the petrol pump. I photographed one in use in Salford in 1986, and now it looks like it is from another era. What at the time may have been rejected as a photo of great tedium has become a fascinating image.