You
For example. It not enough to remember that I was thrown. I have know what led me to it. How did he position me for the throw. What did it feel like? If you can feel those tiny shifts of weight and position , then the better you'll be with countering and preventing.
Have to pay attention while you are engaged. Real time analysis of the situation. Does the person like to move left or right? What does their weight shift feel like. How do they respond when you do A? B? C? what did the do to get you there? What were they targeting? If you know how they got you into the position then bait them so they can do it again. what ever it is you have to be aware of what's happening to you in the small details.What method should I use to figure out what I'm doing wrong when I roll? Right now my approach has been "just show up, have fun, roll, and try and do a little better each time", and I am doing that. But if possible, I'd like to be able to better assess my mistakes and be able to actively fix them.
For example. It not enough to remember that I was thrown. I have know what led me to it. How did he position me for the throw. What did it feel like? If you can feel those tiny shifts of weight and position , then the better you'll be with countering and preventing.