I have a nine month old puppy. How do I teach her to walk next to me?

When I first got her it was the dead of winter and she couldn't take the cold. I enjoy the outdoors (walk, jog, bike) and would like for her to join me to keep me company but she is constantly chasing and barking at everyone or thing that comes past along with pulling on me. I don't want to hurt her or let her get hurt by another dog or person on a bike. Please help.