Drawing From Photo
Original Photoshop Tutorial @ EScrappers.com
1. Open your image.

2. Make a duplicate of the background layer

3. Turn the duplicate to black and white .Use Adjust>Colorize with Saturation 0   .

4. Make a Duplicate of this Layer

5. Adjust>Negitive Image

6. Change the Blend Mode to Dodge.

***You will hardly see anything at this point but don't worry!
 
7. >Adjust>Blur>Gaussian Blur until you get the desired look.

8. to add color make layer 1 Opacity>70 and layer 2 Opacity>90

For examples see below.