You need to be aware of what's happening all around. As a young guy, I was riding with a buddy. We stopped at a light on the edge of town. He looked in his rear view mirror & said, "I don't think this truck is going to stop, so I'm turning right." He made a right turn, and immediately after that the truck driver laid on his horn and blew through the intersection. If he hadn't been vigilant, we'd have been flattened.

In 10th grade drivers ed class, the instructor taught us to never take for granted that someone will stop or turn, regardless of what traffic controls are in place, or what their turn signals say.
I live by this mantra. Situational awareness. Never pull out till you are sure it is clear.
I have been in very few accidents , caused by either myself , or someone else . Gotta pay attention

At my former job I had to turn left from across a road into the work parking lot. I was ALWAYS watching the rear view mirror. I saw a F250 pickup approaching my 914 and not slowing down. Finally I dumped the clutch and did the hardest launch I had done in many long years. I wound it out in first and hit second just as she jerked to the right and missed my bumper by inches. She would have likely have driven right over me and killed me in her big ass truck.