The following "rules of running form" come from Coach Dan Pfaff.
1.) RUN TALL
stacked torse/neutral spine
2.) FLEXED ANKLES
toes up (dorsiflexion) or nuetral is fine; you just don't want your toes pointed downward as it wastes "free energy" and increases the chance of injury.
3.) SCISSORING THIGHS
this means your using your hips/glutes which is the most efficient way to run
4.) STRIKE FROM ABOVE
this has to do with how your foot contacts the ground; you don't want it way out from or behind you. You want your foot to strike just in front of your center of mass (see #4 on the image)
5.) COUNTER-BALANCE ARMS
arms go back (opposite of where we want to go..which is forward!) and naturally come forward