Dodging and burning are techniques used to improve the quality of your print. Dodging lightens areas of the photograph and burning darkens areas of the photographs. The dodging tool is made by cutting a length of wire, and bending one end into a loop. I then covered this loop with black paper so the light wouldn't shine through and just stuck this down with masking tape.
Above is the original print and below is the image that I dodged. I dodged the sky so that it was lighter. It is quite subtle but still effective as it makes the whole image seem lighter.
The image above is quite dark where the wall is, I used the dodge tool to lighten the wall a bit. It is easier to see the brick work but makes the image seem faded.