Don’t be satisfied with the mere act of pinning – go the extra distance and isolate his limbs away from the torso: It’s good to get to a classic pinning position like mount, side or rear mount, but that won’t help much against a well trained and mentally tough opponent who knows his escapes. Once you get to a pin, the onus is one you to immediately work to get his arms separated from his torso so that you can:
1 – get even better control over your opponent by making escape considerably more difficult
2 – make the task of dynamically shifting from one pin to another (the best way to score big points in Jiu Jitsu) much easier
3 – bridge the gap between position and submission by isolating a limb in a way that make submission far more likely than simply waiting for an opponent to make a mistake.