I think this is how I run in shoes anyway. I'm definitely not a heal-striker.
- Strides should be short - don't extend your legs as far as you do with shoes. It should feel almost like you're running in place.
- Keep upright and balanced. Keep your feet under your hips and shoulders.
- Stay light. You should feel like you're light on your feet, not pounding at all. Barefoot runners tend to be a little more springy in their step.
- Run quietly. If you are making a lot of noise with your steps (as shoe-wearing runners do), you're pounding too hard. Try to run softly, quietly, like an animal.