It's not enough to simply "last", you must train to dominate. Prepare mentally and physically to maintain a level of intensity and relentlessness that your opponent is unable or unwilling to sustain.

In some of the Laws that follow I will give a general outline of the type and progression of training necessary to reach the level of conditioning I'm describing. Certainly it doesn't come easily. Still, if the degree of physical and mental intensity I'm suggesting seems out of your grasp, try thinking in these terms:

In each exchange, flurry or scramble for position you need only persist 2-3 seconds longer than your opponent.

When striking from the feet, that means throwing the last punch or kick in each exchange. When grappling, execute the last counter in every flurry or out-hustle your opponent by 2-3 seconds in each scramble for position. Two to three seconds. Consciously make the commitment to that "throw the last punch" mentality and your body will begin to follow.