If you need just a little light on the dark side of a small object, when photographing using light from a window, prop up an old CD with the shiny side facing the dark side of the object. This was taken with window light on the left and light reflecting from the CD on the right side. Keep in mind that the color of the light reflecting off the CD will have the same tone as the color of the CD. A silver, blue or greenish-colored CD will reflect a cool light and a gold-colored CD will reflect warmer light (golden cast).
This is the scarecrow with nothing but window light on the left side.
This is the scarecrow with window light on the left and CD 'light' on the right. Put the CD opposite the window light, and angle it until you get the light right where you want it.
By the way, I like the angle of the shot of the first of these 3 images best. Do you know why? Because the scarecrow's whole smile, more of his hat, and the tines on the rake are visible.
"... it takes a lot of looking before you learn to see the extraordinary."
~ David Bailey, Legendary Photographer ~