Improve Stamina

How do you improve your stamina for running and what is the correct technique?

Here are some drills to improve your stamina:
https://www.breakthroughbasketball.com/fitness/conditioning-drills.html

For running technique, here are a few good drills:
https://www.breakthroughbasketball.com/fitness/basketball-speed-

Otherwise you can google "running technique".

thanks?