During Runs: Things to think on when on your regular runs. Don't try to think of all of them, pick one or two ONLY and focus on those things for that particular run.
Strong, straight posture, back straight with minimal arch in the lower back. (The tighter the bow string, the great the launch of the arrow)
Head up/looking at horizon.
Arm swing, tight between hips and ribs, majority of swing behind body.
Quick cadence, 165-180 steps/min. (think 4/4 time at 180 bpm)
Helps: using a metronome/listening to a playlist of hits w/a 170-180 bpm
HINT: Faster the arm swing, the legs must follow
Toeing off foot and lifting heel in the back side part of stride.
Focus more on what happens with feet behind you than what happens when knees are in front (hopefully, the pendulum is swinging equally on both sides of the body).
Landing as close as you can with your foot underneath the body (best place for the "loading phase.")
Pick a couple of things to work on with a partner and do a regular periodic check with each other.
BONUS 1: Video each other in the middle of the run or after and send it to that person. Perhaps discuss what is seen. Send it to a coach if you'd like.
BONUS 2: If terrain permits, run the last .25 mile of your run in your socks or bare feet. Generally, this points out a lot of your form.
Try Running a portion of this backwards if a safe environment allows.