His thinking inspired me to think of the following assignment to photographers attending a workshop that I do called Seeing and Using Light. On the first day I give each student 1 roll of film and ask them to use only one fixed focal length lens, go for a walk and make a photograph every 25 steps. They can walk in any direction and they can photograph in any direction each time they stop. This assignment is always met with some scepticism but after it is completed the students generally tell me how it has helped them look and see photographs. You might like to try it.
I did something like this out of my own idea to strip down my equipment to focus more on the subject. I went out with a Tri-X loaded SLR and a 50 mm prime lens. Although I didn't force myself to shoot every xx feet I really used my imagination.