I used to work with a program called LINK in Seattle, where volunteers worked with local artists, giving workshops to high school art students once a month. One of the projects we did was a polaroid exploration of the city looking for letterforms in the environment. It was more difficult than it sounds, as we found out, and the kids had a chance to push each other further to find more graceful, more expressive, and more true-to-form letters. They all really showed up and did a great job and the exercise had us all seeing our world differently. Such a valuable thing to practice.
The above images may inspire you to do something similar next time you need a creative boost. Check out more alphabets (not found, but cool regardless) here.