- find images of forms that inspire you and dissect them. Dont trace the outlines fill in the form and create contour lines - shadows and highlights to understand the flow.
- find objects in the real world - study them close your eyes and run your hand over the surface - feel how they transition
- get a pound of play-do and sculpt the photograph and sketch over.
- I also took several classes http://www.jdorr.com/Marker-rendering-techniques.html - and learned many things that are simple but really helped me to excel with form development… sketch from the inside out, use many colors, have fun and let your hand and eys guid you, lightest lights to darkest darks.
If you click on the link you will see a quick video i created to demonstrate. (still can figure out how to embed the videos 
