I hate it in No Gi but if i'm doing it with a Gi, You have a couple of chokes you can do, you can keep changing sides or change knees turn around for the triangle or the mount. I also like arm barring the opposite arm if he tries to move me etc.. one of my favorites is, when he tries to push the knee while not giving away his arm, I jerk his arm towards me and wrap my leg around his neck giving me a triangle
