The obvious answer in both cases, of course, is that there are an almost infinite number of ways to come at it.
Let's begin from where we were yesterday, with the sneaky arm bar drill, but with an opponent who is not quite as defensive.
Step 1: My opponent starts out on her base, with her legs spread apart, on her knees and her arms pulled in tight, but not as much in a ball as in the first step in the previous technique. When I pull her toward me and try to roll her, she puts the arm nearest me - her right arm - out to stop me from turning here.
Step 2: Here I am doing a half-nelson wrong. I have my right arm under her right arm. I have my left arm over her back, shoving her elbow forward trying to keep her from posting with that arm to stop the half-nelson. I have my left leg bent, with my knee up against her body and my right leg straight, driving my weight on her. I am going to try to walk around her head and pin her.
Step 4: As I stand up, I pull her arm against my chest. My right hand, which was on her head, comes up to grab her arm, too. My right leg is across her body and I am practically sitting on her shoulder.
Step 6: Here is how it ends again, with his arm locked against me, knees tight and me arching my hips to execute the arm bar.
After a while, when I am teaching, someone is bound to ask -
"All of this is set up to get the person to resist by putting an arm out, but what if they DON'T? What if they have caught on to you? That must happen eventually, right?"
That is right, and it absolutely does happen. In that case, if the person does not put an arm out, he or she ends up pinned. The reason that the way I did the half-nelson above is wrong is that anyone can stop it easily by posting out with that left arm. If the opponent doesn't do that, then I end up getting the pin. The same is true for the turnover I discussed previously.
The more of a reputation I got for arm bars, the more people I pinned. Because my opponents were so intent on holding their arms in tight to keep from being arm barred, they weren't able to defend against pins effectively.
That IS sneaky, isn't it?