Increase the diameter of your brake rotors: Every inch of rotor diameter increases the brakes leverage to stop the vehicle. Many models of car/truck have larger brake discs available for sporting models. For some more pedestrian models look to bigger cars/trucks from the same manufacture.
Although different diameters of brake rotors are sometimes available as a high performance option, these rotors also require different calipers, so the swap is not trivial. Also, the standard size of wheel may not fit over the larger brakes, so a wheel diameter change may be required as well.
Realistically, only a few percent larger diameter is likely to be available without radical mechanical changes, but even that difference can be worthwhile.