Note: These are guidelines based on an average 'general public' runner taking part in endurance distances (5k+) rather than technique suggestions for shorter (speed focused) distances. I'm very much a believer that there's no one 'correct' way to run that suits everyone. But these are good starting points for you to start analysing your own technique and getting more efficient. I hope they're useful.
1. Increase cadence rather than stride length
2. Reduce vertical movement
Limit the 'Tigger' factor and running gets a lot easier!
Though perhaps not completely scientifically accurate, I like this quote on forward lean:
'When the entire body participates, you're using gravity to your advantage. Remember, running is controlled falling.' - Scott Jurek, 'Eat and Run'
I'm off out now for some controlled falling :) Hope you can use these tips to start you thinking about your form and technique?